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Philosophical concept
In the philosophy of mind, the hard problem of consciousness (or simply the hard problem) is to explain how and why organisms have qualia, phenomenal
Hard_problem_of_consciousness
2015 play by Tom Stoppard
The Hard Problem is a play by Tom Stoppard, first produced in 2015. The title refers to the hard problem of consciousness, which Stoppard defines as having
The_Hard_Problem
Complexity class
computational complexity theory, a computational problem H is called NP-hard if, for every problem L which can be solved in non-deterministic polynomial-time
NP-hardness
Topics referred to by the same term
Hard problem may refer to: The Hard Problem, a 2015 play by Tom Stoppard Hard problems, in computational complexity theory Hard problem of consciousness
Hard_problem
Unsolved problem in computer science
Unsolved problem in computer science If the solution to a problem can be checked in polynomial time, must the problem be solvable in polynomial time? More
P_versus_NP_problem
View that mind is a ubiquitous feature of reality
in the mid-20th century associated with the rise of logical positivism. Recent interest in the hard problem of consciousness and developments in the fields
Panpsychism
Theory within consciousness research
so-called "hard problem". Rather than try to start from physical principles and arrive at consciousness, IIT "starts with consciousness" (accepts the existence
Integrated_information_theory
Irish actor
Stoppard's The Hard Problem, which ran until 17 May 2015 and also had a worldwide broadcast via NT Live, on 16 April 2015. Both plays were directed by the then
Damien_Molony
Ability to make choices voluntarily
It has been noted that the laws of physics have yet to resolve the hard problem of consciousness: "Solving the hard problem of consciousness involves
Free_will
NP-hard problem in combinatorial optimization
cities, what is the shortest possible route that visits each city exactly once and returns to the origin city?" It is an NP-hard problem in combinatorial
Travelling_salesman_problem
Thought experiment in philosophy
against forms of physicalism and in defense of the hard problem of consciousness, which is the problem of accounting in physical terms for subjective
Philosophical_zombie
2021 book by Anil Seth
Seth's position on the hard problem of consciousness to fall in the middle between the two positions of either finding the hard problem to be meaningful
Being You: A New Science of Consciousness
Being_You:_A_New_Science_of_Consciousness
Conscious event, perception or practical knowledge
experience is involved in the mind–body problem and the hard problem of consciousness, both of which try to explain the relation between matter and
Experience
American actor (born 1978)
vivid Iranian voice". The Guardian. Retrieved March 24, 2019. Staff (November 4, 2019). "L.A. Theatre Works Records The Hard Problem By Tom Stoppard At UCLA"
Eddie_Cahill
The Philosophical Quarterly. 32 (127): 127–136. doi:10.2307/2960077. JSTOR 2960077. Block, Ned (2002). "The Harder Problem of Consciousness". The Journal
List of philosophical problems
List_of_philosophical_problems
Australian philosopher and cognitive scientist (born 1966)
Sciences. Chalmers is best known for formulating the hard problem of consciousness, and for popularizing the philosophical zombie thought experiment. Chalmers
David_Chalmers
Branch of philosophy
issues are addressed, such as the hard problem of consciousness and the nature of particular mental states. Aspects of the mind that are studied include
Philosophy_of_mind
English actress
Lear at The Royal National Theatre. In 2015, Vinall took centre stage again at National Theatre Live in Tom Stoppard's play The Hard Problem as Hilary
Olivia_Vinall
Optimization problem in computer science
problems is central to the construction of secure lattice-based cryptosystems: lattice problems are an example of NP-hard problems which have been shown
Lattice_problem
American cognitive psychologist and popular science author
scientific explanation. Hoffman proposes a solution to the hard problem of consciousness by adopting the converse view that consciousness causes brain activity
Donald_D._Hoffman
Open question in philosophy of how abstract minds interact with physical bodies
The mind–body problem is a philosophical problem concerning the relationship between thought and consciousness in the human mind and body. It addresses
Mind–body_problem
Awareness of internal and external existence
he calls this the hard problem of consciousness. Some philosophers believe that Block's two types of consciousness are not the end of the story. William
Consciousness
Philosophical position on the mind-body problem
position proposing that the hard problem of consciousness cannot be resolved by humans. The unresolvable problem is how to explain the existence of qualia
New_mysterianism
points on dream consciousness as explained in his works. The “Hard problem” is defined as the difficulty in specifying how subjective awareness could arise
Dream_consciousness
NP-complete problem in computer science
that solve the problem in many instances, either optimally or approximately. For this reason, it has been called "the easiest hard problem". There is
Partition_problem
Class of metaphysical theories in the philosophy of mind
within the philosophy of mind, specifically the mind–body problem and the hard problem of consciousness. The mind–body problem is the problem of explaining
Neutral_monism
Problem of communication when asking for help
The XY problem is a communication problem encountered in help desk, technical support, software engineering, or customer service situations where the
XY_problem
Ascribing an impossible property to a thing
Professor of Philosophy at the City University of New York, argues that the "hard problem of consciousness", as expressed by David Chalmers and others, rests
Category_mistake
Thought experiment on artificial intelligence
consciousness is at the root of the matter" of the Chinese room. Colin McGinn argues that the Chinese room provides evidence that the hard problem of consciousness
Chinese_room
American actor
of the Class. Hall began her professional acting career in the theater in 2016, when she played the role of Cathy Krohl in The Hard Problem at the Studio
Katie_Beth_Hall
Model of consciousness
conscious: the hard problem of consciousness. However, the abstract of Avshalom Elitzur's 1997 paper summarized that while GWT "does not address the 'hard problems
Global_workspace_theory
Mathematical problem in operations research
optimization problem in mathematics that arises from applications in industry. In terms of computational complexity, the problem is an NP-hard problem reducible
Cutting_stock_problem
American writer
A Brief Guide to the Fundamental Mystery of the Mind. Key subjects of Conscious include free will, panpsychism and the hard problem of consciousness.
Annaka_Harris
Decision problem in computer science
SSP is NP-hard. The complexity of the best known algorithms is exponential in the smaller of the two parameters n and L. The problem is NP-hard even when
Subset_sum_problem
Hypothesis in computational complexity theory
like the planted clique conjecture. However, for cryptographic applications, knowing that a problem has some hard instance (the problem is hard in the worst-case)
Computational hardness assumption
Computational_hardness_assumption
Ability to readily identify logical or mathematical truth
(PDF) from the original on 2019-10-21. Retrieved October 21, 2019. Aas, Benjamin (2011). "Body-Gödel-Mind: The unsolvability of the hard problem of consciousness"
Logical_intuition
Research into the problem of consciousness
Neurophenomenology refers to a scientific research program aimed at addressing the hard problem of consciousness in a pragmatic way. It combines neuroscience with
Neurophenomenology
Hypothetical process of digitally emulating a brain
described by Alexey Turchin. The main philosophical problem faced by mind uploading is the hard problem of consciousness: the difficulty of explaining how
Mind_uploading
Unsolved problem in computational complexity theory
solution to a GI-hard problem would yield a polynomial-time solution to the graph isomorphism problem (and so all problems in GI). A problem X {\displaystyle
Graph_isomorphism_problem
2014 book by Stanislas Dehaene
consciousness but feels that the hard problem remains unresolved. Like Kalat, Hutson finds Dehaene's dismissal of the hard problem unjustified because consciousness
Consciousness_and_the_Brain
Branch of computational complexity theory
parameters. This allows the classification of NP-hard problems on a finer scale than in the classical setting, where the complexity of a problem is only measured
Parameterized_complexity
Totality of psychological phenomena
mind–body problem by arguing that it is based on an artificial dichotomy not present in the phenomenological description of experience. The hard problem of consciousness
Mind
1996 philosophy book by David Chalmers
they claim to have solved the "hard problem of consciousness", when really all they have solved are certain "easy problems of consciousness". Chalmers
The_Conscious_Mind
Combinatorial optimization problem
problem with a wide range of applications from finance and economics to machine learning. QUBO is an NP hard problem, and for many classical problems
Quadratic unconstrained binary optimization
Quadratic_unconstrained_binary_optimization
American actor
played the role of Spike in Tom Stoppard's The Hard Problem at the Lincoln Center. In November 2020, O'Shea was cast in a recurring role on the third season
Christopher_O'Shea
NP-hard problem in combinatorial optimization
The ring star problem (RSP) is a NP-hard problem in combinatorial optimization. In a complete weighted mixed graph, the ring star problem aims to find
Ring_star_problem
Type of computational problem
{\displaystyle R} . A problem R {\displaystyle R} is FNP-complete if it is FNP-hard and in FNP. The problem FSAT is an FNP-complete problem, and hence by self-reducibility
Function_problem
Inability to describe conscious experiences in solely physical or structural terms
explanation for experience and qualia) is known as "the hard problem". The hardness of the problem is such that mysterians believe it can never be solved
Explanatory_gap
British actor
Rycroft Twelfth Night (2017) as Malvolio at the Royal Exchange, Manchester The Hard Problem (2015) Stephen Ward the Musical (2013–2014) Private Lives (2013)
Anthony_Calf
Hypothetical internal cognitive symbol that represents external reality
about the nature of phenomenal character, as well as offer a potential solution to the hard problem of consciousness. The successful reduction of the phenomenal
Mental_representation
2019 book by Philip Goff
Philip Goff. The book presents a defense of the theory of panpsychism as the solution to the hard problem of consciousness. The title of the book refers
Galileo's_Error
Problem in combinatorial optimization
The traveling purchaser problem (TPP) is an NP-hard problem studied in operations research and theoretical computer science. Given a list of marketplaces
Traveling_purchaser_problem
Theories proposing consciousness as an electromagnetic phenomenon
new physics can resolve the hard problem of consciousness. He argues that quantum theories of consciousness suffer from the same weakness as more conventional
Electromagnetic theories of consciousness
Electromagnetic_theories_of_consciousness
British actor (born 1953)
London, and in 2015 in the world premiere production of Stoppard's The Hard Problem. Jonathan Coy at IMDb The Unseen Hook at the Internet Movie Database
Jonathan_Coy
Unrelated vertices in graphs
problem of finding such a set is called the maximum independent set problem. It is a strongly NP-hard problem. As such, it is unlikely that there exists
Independent set (graph theory)
Independent_set_(graph_theory)
Type of AI with wide-ranging abilities
unknown to the AGI developers before the test is administered. A problem is informally called "AI-complete" or "AI-hard" if it is believed that AGI would
Artificial general intelligence
Artificial_general_intelligence
Problem in cryptography
that over many groups the DHP is almost as hard as the DLP. There is no proof to date that either the DHP or the DLP is a hard problem, except in generic
Diffie–Hellman_problem
Combinatorial optimization problem
Intuitively, the objective function encourages facilities with high flows between each other to be placed close together. The problem is NP-hard, so there
Quadratic_assignment_problem
Process of achieving a goal by overcoming obstacles
Problem solving is the process of achieving a goal by overcoming obstacles, a frequent part of most activities. Problems in need of solutions range from
Problem_solving
Task of computing complete subgraphs
networks, the clique problem also has many applications in bioinformatics, and computational chemistry. Most versions of the clique problem are hard. The clique
Clique_problem
Problem in computer science
theory, the halting problem is the decision problem of determining, from a description of an arbitrary computer program and an input, whether the program
Halting_problem
Inherent difficulty of computational problems
particular, the set of problems that are hard for NP is the set of NP-hard problems. If a problem X {\displaystyle X} is in C {\displaystyle C} and hard for C
Computational complexity theory
Computational_complexity_theory
American sci-fi television series
Problem is an American science fiction television series created by David Benioff, D. B. Weiss, and Alexander Woo. It is the third adaptation of the Chinese
3_Body_Problem_(TV_series)
Subfield of mathematical optimization
travelling salesman problem ("TSP"), the minimum spanning tree problem ("MST"), and the knapsack problem. In many such problems, such as the ones previously
Combinatorial_optimization
Branch of philosophy
"Facing up to the hard problem of consciousness." Journal of Consciousness Studies 2, 3, 200–219. Dretske, Fred (1981). Knowledge and the Flow of Information
Philosophy_of_perception
on some hard mathematical problem, and it is proved that finding collisions of the hash function is as hard as breaking the underlying problem. This gives
Security of cryptographic hash functions
Security_of_cryptographic_hash_functions
Observation that perception requires more computation than reasoning
1994 that "the main lesson of thirty-five years of AI research is that the hard problems are easy and the easy problems are hard". By the 2020s, in accordance
Moravec's_paradox
Problem of finding the best feasible solution
economics, an optimization problem is the problem of finding the best solution from all feasible solutions. Optimization problems can be divided into two
Optimization_problem
1982 studio album by the Who
It's Hard is the tenth studio album by the English rock band the Who. Released in September 1982, it was the final Who album to feature bassist John Entwistle
It's_Hard
Hindu monk
conversation on the Hard problem of consciousness. Fortune India mentions Sarvapriyananda as "one of the best known lecturers of the Vedanta in the world today"
Swami_Sarvapriyananda
2008 science fiction novel by Liu Cixin
The Three-Body Problem (Chinese: 三体; pinyin: Sān tǐ; lit. 'three body') is a 2008 novel by the Chinese hard science fiction author Liu Cixin. It is the
The Three-Body Problem (novel)
The_Three-Body_Problem_(novel)
British psychologist (1934–2004)
solution to the 'hard problem' of how consciousness arises. Gray was opposed to the idea that the brain contains a representation of the external world
Jeffrey_Alan_Gray
Class of algorithms that find approximate solutions to optimization problems
solutions to optimization problems (in particular NP-hard problems) with provable guarantees on the distance of the returned solution to the optimal one. Approximation
Approximation_algorithm
On short connecting nets with added points
tree problem variants. Most versions of the Steiner tree problem are NP-hard, but some restricted cases can be solved in polynomial time. Despite the pessimistic
Steiner_tree_problem
problem. This problem is easier to solve than integer factorization, so the assumption that this problem is hard to solve is stronger than the assumption
Higher_residuosity_problem
Instances of subjective experience
actually exists, the possibility is raised as a refutation of physicalism, and in defense of the hard problem of consciousness (the problem of accounting
Qualia
Notion of the "hardest" or "most general" problem in a complexity class
a problem p is called hard for a complexity class C under a given type of reduction if there exists a reduction (of the given type) from any problem in
Complete_(complexity)
On domino tiling after removing two corners
formulation of the problem. Despite the existence of general methods such as those based on graph matching, it is exponentially hard for resolution to
Mutilated_chessboard_problem
Malaysian actress and writer
production as artistic director for the National Theatre, Tom Stoppard's The Hard Problem. The play was Stoppard's first for the theatre since 2006 and a special
Vera_Chok
Node labeling problem in graph theory
} Both the unweighted and weighted versions are special cases of the quadratic bottleneck assignment problem. The bandwidth problem is NP-hard, even for
Graph_bandwidth
2014 studio album by Miyuki Nakajima
Hard Problems (問題集, Mondaishū) is the 40th studio album by Japanese singer-songwriter Miyuki Nakajima, released in 2014. The album contained the single
Hard_Problems
Problem that is difficult or impossible to solve
recognize. It refers to an idea or problem that cannot be fixed, where there is no single solution to the problem; "wicked" does not indicate evil, but
Wicked_problem
Probability of shared birthdays
theory, the birthday problem asks for the probability that, in a set of n randomly chosen people, at least two will share the same birthday. The birthday
Birthday_problem
American philosopher
of the hard problem of consciousness, and as one of the main objections materialist theories in the philosophy of mind must address. The idea of the explanatory
Joseph_Levine_(philosopher)
Topics referred to by the same term
Whitcomb from The Hard Way, 2025 "Problem", by Erin Bowman "Problem", by Šarlo Akrobata from Bistriji ili tuplji čovek biva kad... "Problems", by Against
Problem_(disambiguation)
Intelligence of machines
(AI) is the capability of computational systems to perform tasks typically associated with human intelligence, such as learning, reasoning, problem-solving
Artificial_intelligence
number of equations. This problem is closely related to the MAX-3SAT problem. It is NP-hard to approximate MAX-3LIN-EQN with ratio (1/2 + δ) for any δ > 0.
MAX-3LIN-EQN
Study of general and fundamental questions
terms of the functional or causal roles they play. The mind-body problem is closely related to the hard problem of consciousness, which asks how the physical
Philosophy
Optimizing objective functions that have constrained variables
programming problem. If all the hard constraints are linear and some are inequalities, but the objective function is quadratic, the problem is a quadratic
Constrained_optimization
science, the closest string is an NP-hard computational problem, which tries to find the geometrical center of a set of input strings. To understand the word
Closest_string
Artificial intelligence (AI) program
an artificial intelligence (AI) program that can solve hard problems in Euclidean geometry. The system comprises a data-driven large language model (LLM)
AlphaGeometry
Religious belief
Christians Sermon on the Mount The Aquarian Gospel of Jesus the Christ Tolstoyan movement Owen J. Flanagan. The Really Hard Problem: Meaning in a Material
Jesuism
Complexity class
in NP. A problem is NP-complete if it is both in NP and NP-hard. The NP-complete problems are thus, in a sense, the hardest problems in NP. The Cook–Levin
NP-completeness
Operations research problem, paradigm of constrained scheduling problems
back to the 1950s, the nurse scheduling problem in its current form was introduced in two parallel publications in 1976. It is known to have NP-hard complexity
Nurse_scheduling_problem
Problem caused by profanity filters on the Internet
The Scunthorpe problem is the unintentional blocking of online content by a spam filter, search engine or wordfilter because the text contains a string
Scunthorpe_problem
Philosophical view that some states of mind, as commonly understood, do not exist
treat mental states as having phenomenal properties so the hard problem "may not be a genuine problem for non-philosophers (despite its overwhelming obviousness
Eliminative_materialism
Problem of finding the longest simple path for a given graph
to the shortest path problem, which can be solved in polynomial time in graphs without negative-weight cycles, the longest path problem is NP-hard and
Longest_path_problem
Seven mathematical problems with a US$1 million prize for each solution
dollars for the first correct solution to each problem. The Clay Mathematics Institute officially designated the title Millennium Problem for the seven unsolved
Millennium_Prize_Problems
(or NP-hard) problem is weakly NP-complete (or weakly NP-hard) if there is an algorithm for the problem whose running time is polynomial in the dimension
Weak_NP-completeness
Class of computational complexity
BQPCTC, problems solvable by quantum computers using closed timelike curves. A language B is PSPACE-complete if it is in PSPACE and it is PSPACE-hard, which
PSPACE
THE HARD-PROBLEM
THE HARD-PROBLEM
Female
German
Pet form of German Kätharina, KÄTHE means "pure."
Surname or Lastname
English (chiefly Yorkshire and Northumbria), also Scottish
English (chiefly Yorkshire and Northumbria), also Scottish : variant spelling of Heard.
Male
Egyptian
, Horus the Executer of Justice.
Boy/Male
American, Anglo, Arabic, Australian, British, Christian, English, German, Irish, Jamaican, Teutonic
Bard; Surname; Guardian; Watchman
Surname or Lastname
English
English : variant of Heard.
Surname or Lastname
English, Scottish, and French
English, Scottish, and French : nickname for a brave or
foolhardy man, from Old French, Middle English hardi ‘bold’,
‘courageous’ (of Germanic origin; compare Hard 1).Irish : in addition to being an importation of the English name,
this is also found as an Anglicized form (by partial translation) of
Gaelic Mac Giolla Deacair ‘son of the hard lad’.Scottish : variant spelling of Hardie 2.Bearers of the surname Hardy from Anjou and Normandy, France, are documented
in Quebec City in 1669. The secondary surnames Châtillon,
Surname or Lastname
English and North German
English and North German : from a personal name or nickname meaning ‘stag’, Middle English hert, Middle Low German hërte, harte.German : variant spelling of Hardt 1 and 2.Jewish (Ashkenazic) : ornamental name or a nickname from German and Yiddish hart ‘hard’.Irish : Anglicized form of Gaelic Ó hAirt ‘descendant of Art’, a byname meaning ‘bear’, ‘hero’. The English name became established in Ireland in the 17th century.French : from an Old French word meaning ‘rope’, hence possibly a metonymic occupational name for a rope maker or a hangman.Dutch : nickname from Middle Dutch hart, hert ‘hard’, ‘strong’, ‘ruthless’, ‘unruly’.This name was brought independently to New England by many bearers from the 17th century onward. Stephen Hart was one of the founders of Hartford, CT, (coming from Cambridge, MA, with Thomas Hooker) in 1635.
Male
Japanese
(1-晴, 2-春, 3-陽) Japanese unisex name HARU means 1) "clear up," 2) "spring," or 3) "sun, sunlight." Compare with another form of Haru.
Male
Hindi/Indian
(हरि) Hindi name HARI means "he who takes away." In Hindu mythology, this is a name borne by Vishnu.
Male
German
Short form of German Harman, HARM means "bold/hardy man." In use by the Dutch.
Surname or Lastname
English (chiefly Midlands)
English (chiefly Midlands) : variant spelling of Heard.
Surname or Lastname
English
English : variant of Herd.Respelling of Swedish HÃ¥rd (see Hard 2).
Surname or Lastname
English
English : from the possessive case of the personal name Hard, denoting a son or servant of someone called Hard.
Boy/Male
British, English, German
From the Yard on a Hill; Hard Warrior
Boy/Male
Hindu
Hearts feeling, Main, Meaning
Surname or Lastname
English and German
English and German : nickname for someone with a deformed hand or who had lost one hand, from Middle English hand, Middle High German hant, found in such appellations as Liebhard mit der Hand (Augsburg 1383).Jewish (Ashkenazic) : nickname from German Hand ‘hand’ (see 1).Irish : Anglicized form of Gaelic Ó Flaithimh (see Guthrie), resulting from an erroneous association of the Gaelic name with the Gaelic word lámh ‘hand’. It is used as an English equivalent for several other names of Gaelic origin too, e.g. Claffey, Glavin, and McClave.Dutch : from a variant of hont ‘dog’, ‘hound’, either a derogatory nickname, or a habitational name for someone living at a house distinguished by the sign of a dog.
Boy/Male
Hindu, Indian
Hearts Feelings
Surname or Lastname
English
English : habitational name from Chard or South Chard in Somerset, recorded in Domesday Book as Cerdren, possibly from Old English ceart ‘rough heathland’ + ærn ‘building’, ‘dwelling’. In some instances the surname may have arisen simply as a topographic name from ceart.French : from the personal name Chard, a short form of Richard;French : habitational name for someone from Chard in the department of Creuse.
Male
English
Pet name for longer English names containing Hard- or Hart-, HARDY means "brave, hardy, strong."Â
Surname or Lastname
English
English : from the Old English personal name Heard or a Norman cognate Hard(on), also of Germanic origin. This was a byname meaning ‘hardy’, ‘brave’, ‘strong’, but it also seems to have been used as a short form of the various compound names containing this as a first element. Occasionally this may also be a variant of Hardy.English, German, Dutch, and Swedish (Hård) : nickname for a stern or severe man, from Middle English, Middle Low German hard, Middle Dutch hart, hert, Swedish hård ‘hard’, ‘inflexible’. The Swedish name was probably originally a soldier’s name.English : topographic name for someone who lived on a patch of particularly hard ground or one that was difficult to farm. Compare Hardacre.Dutch : occupational name from Middle Dutch harde, herde ‘herder’.
THE HARD-PROBLEM
THE HARD-PROBLEM
Girl/Female
Bengali, Hindu, Indian, Marathi, Sindhi
Creeper
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu
Light from Heart; Moon
Boy/Male
Arabic, Muslim, Pashtun
Flower; Garden
Boy/Male
Hindu
The God of Sun or knowledge
Boy/Male
Indian, Marathi
Good Thinking Person
Girl/Female
Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Parting Line
Boy/Male
Arabic, Muslim
Wise
Boy/Male
Tamil
Full of nectar
Boy/Male
Muslim
Garden
Girl/Female
Hebrew
Grace.
THE HARD-PROBLEM
THE HARD-PROBLEM
THE HARD-PROBLEM
THE HARD-PROBLEM
THE HARD-PROBLEM
superl.
Difficult to accomplish; full of obstacles; laborious; fatiguing; arduous; as, a hard task; a disease hard to cure.
v. t.
To pledge by the hand; to handfast.
superl.
Difficult, mentally or judicially; not easily apprehended, decided, or resolved; as a hard problem.
adv.
With tension or strain of the powers; violently; with force; tempestuously; vehemently; vigorously; energetically; as, to press, to blow, to rain hard; hence, rapidly; as, to run hard.
a.
Hard-featured; ill-looking; as, Vulcan was hard-favored.
superl.
Wanting softness or smoothness of utterance; harsh; as, a hard tone.
a.
Having hard or strong hands; as, a hard-fisted laborer.
adv.
With difficulty; as, the vehicle moves hard.
v. t.
To confine (cattle) to the yard; to shut up, or keep, in a yard; as, to yard cows.
superl.
Rough; acid; sour, as liquors; as, hard cider.
superl.
Not easily penetrated, cut, or separated into parts; not yielding to pressure; firm; solid; compact; -- applied to material bodies, and opposed to soft; as, hard wood; hard flesh; a hard apple.
superl.
Difficult to please or influence; stern; unyielding; obdurate; unsympathetic; unfeeling; cruel; as, a hard master; a hard heart; hard words; a hard character.
a.
Having hard hands, as a manual laborer.
superl.
Difficult to bear or endure; not easy to put up with or consent to; hence, severe; rigorous; oppressive; distressing; unjust; grasping; as, a hard lot; hard times; hard fare; a hard winter; hard conditions or terms.
v. t.
To harden; to make hard.
a. Vigorously
contested; as, a hard-fought battle.
superl.
Not easy or agreeable to the taste; stiff; rigid; ungraceful; repelling; as, a hard style.
n.
The hard wing case of a beetle.
n.
To play on the harp.
v. t.
To give, pass, or transmit with the hand; as, he handed them the letter.