Unreasonable — Meaning, Definition & Synonyms

adjective /ˌən-ˈrēz-nə-bəl/ un·rea·son·able

Meaning & Definition of Unreasonable

Unreasonable (adjective)

  1. not governed by or acting according to reason
  2. not conformable to reason, absurd
  3. exceeding the bounds of reason, appropriateness, or moderation

Unreasonable (adjective) — Senses, Synonyms & Antonyms

  1. having no basis in reason or fact

    "an unreasonable assumption"

    similar: baseless, foundationless, groundless, invalid, nonvalid, unfounded, unsubstantiated, unsupported, unwarranted
    related: illogical, irrational, nonlogical, unconscionable, unsound, fallacious, false, misled, wrong, gratuitous, uncalled-for, unnecessary, flimsy, implausible, misleading, specious, unconvincing, untenable, weak, ill-advised, unreasoned, inconsistent, absurd, asinine, brainless, crackpot, crazy, fatuous, foolish, half-witted, harebrained, meaningless, nonsensical, preposterous, senseless, silly, simpleminded, stupid, unwise, insane, mad, nutty, wacky
    opposite: good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded
    near: certified, validated, verified, confirmed, corroborated, informed, logical, rational, commonsense, sane, sensible, sober, wise, actual, genuine, real, true, certain, sure, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, sound

  2. not using or following good reasoning

    "an unreasonable respect for a man who did not deserve it"

    similar: fallacious, illegitimate, illogical, inconsequent, inconsequential, invalid, irrational, nonrational, unreasoning, unsound, weak
    related: eristic, misleading, sophistic, specious, half-baked, ill-advised, misguided, unconsidered, unreasoned, inconsistent, absurd, asinine, foolish, meaningless, nonsensical, preposterous, reasonless, senseless, silly, Kafkaesque, odd, peculiar, strange, surreal, unusual, weird, insane, mad, nutty, wacky, disordered, disorganized, rambling, random, unconvincing, inexplicable, unaccountable, unexplainable
    opposite: logical, rational, reasonable, sound, valid, well-founded, well-grounded
    near: commonsense, sane, sensible, sober, wise, enlightened, informed, just, justified, reasoned, ordered, organized, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, certain, sure, true, confirmed, corroborated, demonstrated, established, substantiated, validated

Synonyms, Thesaurus & Another Word for Unreasonable

The most common words with a similar meaning to Unreasonable:

baseless, foundationless, groundless, invalid, nonvalid, unfounded, unsubstantiated, unsupported, unwarranted, fallacious, illegitimate, illogical, inconsequent, inconsequential, irrational, nonrational, unreasoning, unsound, weak

Antonyms & Opposite Words for Unreasonable

Words with the opposite meaning of Unreasonable:

good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded, logical, rational, sound

Related Words for Unreasonable

nonlogical, unconscionable, false, misled, wrong, gratuitous, uncalled-for, unnecessary, flimsy, implausible, misleading, specious, unconvincing, untenable, ill-advised, unreasoned, inconsistent, absurd, asinine, brainless, crackpot, crazy, fatuous, foolish, half-witted, harebrained, meaningless, nonsensical, preposterous, senseless

Near Antonyms of Unreasonable

certified, validated, verified, confirmed, corroborated, informed, commonsense, sane, sensible, sober, wise, actual, genuine, real, true, certain, sure, clear, cogent, compelling, convincing, credible, persuasive, plausible, satisfying, solid, enlightened, ordered, organized, demonstrated

Word Forms of Unreasonable

Derived words: unreasonableness (noun), unreasonably (adverb)

Origin & Etymology of Unreasonable

First known use: 14th century

Frequently Asked Questions about Unreasonable

What does "Unreasonable" mean?

"Unreasonable" means not governed by or acting according to reason. As an adjective, it is defined as: not governed by or acting according to reason. It has 2 distinct senses.

What is another word for "Unreasonable"?

Other words for "Unreasonable" include baseless, foundationless, groundless, invalid, nonvalid, unfounded, unsubstantiated and unsupported. The best synonym depends on which meaning of "Unreasonable" you intend.

What are different ways to say "Unreasonable"?

There are 77 words and phrases with a similar meaning to "Unreasonable". Common alternatives include baseless, foundationless, groundless, invalid, nonvalid, unfounded, unsubstantiated, unsupported, unwarranted and fallacious.

What is the opposite of "Unreasonable"?

Antonyms of "Unreasonable" include good, hard, just, justified, reasonable, reasoned, substantiated and valid. Near antonyms include certified, validated, verified and confirmed.

How do you use "Unreasonable" in a sentence?

Examples of "Unreasonable" in a sentence: "an unreasonable assumption"; "an unreasonable respect for a man who did not deserve it".

Is "Unreasonable" a noun, verb, or adjective?

"Unreasonable" is an adjective.

How do you pronounce "Unreasonable"?

"Unreasonable" is pronounced /ˌən-ˈrēz-nə-bəl/ and divided into syllables as un·rea·son·able.

What is the origin of the word "Unreasonable"?

First known use: 14th century.