Synonyms of irrational

irrational

adjective

i-ˈra-sh(ə-)nəl 

as in unreasonable

not using or following good reasoning

it's irrational to think that you can continue to consume an excess of calories and not gain weight

Synonyms & Similar Words

• unreasonable
• unreasoning
• illegitimate
• unreasoned
• illogical
• misleading
• absurd
• weak
• foolish
• nonrational
• silly
• fallacious
• invalid
• weird
• inconsequential
• meaningless
• unsound
• inconsequent
• unusual
• inconsistent
• strange
• odd
• sophistical
• misguided
• specious
• insane
• sophistic
• nonsensical
• random
• asinine
• unconsidered
• surreal
• mad
• inexplicable
• preposterous
• ill-advised
• eristic
• eristical
• disordered
• disorganized
• unexplainable
• nutty
• unaccountable
• reasonless
• whacky
• senseless
• unconvincing
• wacky
• half-baked
• Kafkaesque
• peculiar
• rambling

Antonyms & Near Antonyms

• rational
• reasonable
• logical
• valid
• sound
• sensible
• wise
• sane
• justified
• sober
• reasoned
• well-founded
• enlightened
• informed
• just
• well-grounded
• certain
• plausible
• commonsense
• compelling
• clear
• persuasive
• solid
• organized
• convincing
• credible
• true
• sure
• satisfying
• cogent
• ordered
• demonstrated
• confirmed
• established
• validated
• substantiated
• corroborated

Examples Sentences

Recent Examples of irrational

For a movie centered on the irrational, his version of the tale is substantially rationalized, with many exchanges and set pieces dramatically expanded to furnish the plot with more specific exposition and the characters with more explicit motives. —Richard Brody, The New Yorker, 23 Dec. 2024

If that makes any sense — because people use conspiracy theories as the reason to validate irrational and sometimes very counterproductive behavior. —Rachael Skinner, SPIN, 16 Dec. 2024

The lines — in banana yellows, tangerine oranges, cranberry reds — twist and turn and suggest an irrational understanding of how the universe works. —Ray Mark Rinaldi, The Denver Post, 16 Dec. 2024

Conversely, what then could be more wasteful, more undesirable, and more irrational than negating a large share of these conversion gains by wasting them? —Vaclav Smil, WIRED, 12 Dec. 2024