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Definition of irrational:
Synonyms:
irrational number, inconsequent, ill-judged, unreasoning, inconclusive, unsound, ill-advised, unreasonable, blind, jaundiced, wrong, yellow, mistaken, reason, monstrous, weak, false, erroneous, inconsequential, reasonless, superstitious, incorrect, incoherent, out of bounds, wild, unreasoned, childish, extreme, irresponsible, illegitimate, specious, perverse, nonrational, untenable, chimerical, ill-considered, infatuated, anomalous.
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absurd (part of speech: adjective)
- idiotic,
- nonsensical,
- incongruous,
- absurd,
- farcical,
- invalid,
- crazy,
- impossible,
- foolish,
- inconsistent,
- paradoxical,
- implausible,
- ridiculous,
- outlandish,
- bizarre,
- ludicrous,
- illogical,
- meaningless,
- anachronistic,
- silly,
- senseless,
- preposterous,
- stupid,
- inane,
- eccentric,
- contradictory,
- fallacious,
- self-contradictory
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insane (part of speech: adjective)
- demented,
- maniacal,
- kooky,
- feverish,
- babbling,
- lunatic,
- hysterical,
- deranged,
- crack-brained,
- brain-sick,
- psychotic,
- nutty,
- mad,
- unbalanced,
- berserk,
- crazy,
- frenzied,
- delirious,
- neurotic,
- schizoid,
- psycho,
- blithering,
- batty,
- insane
Usage examples:
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Oh, my friend, say what you please, argue how you like, this crowding together of men and women in unnatural surroundings, this haste to be rich in material things, this attempt to enjoy without production, this removal from first- hand life, is irrational, and the end of it is ruin.
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There were now negative numbers, irrational numbers such as square roots, and imaginary numbers such as square roots of negative numbers.