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

From their beginning, the neocons harbored a deep, visceral, almost irrational animosity toward Russia. —Jason Fields, Newsweek, 5 Dec. 2024

The emotional, messy, unquantifiable part of us — that’s not a dumber or more irrational part. —Sigal Samuel, Vox, 3 Dec. 2024

The fact that quite a few Californians are weighing 2026 bids for the governorship testifies to the essentially irrational nature of political ambition. —Dan Walters, Orange County Register, 14 Nov. 2024

Strict scrutiny exists because racial distinctions are presumed to be irrational — because race is an artificial category that has often been abused. —The Editors, National Review, 5 Dec. 2024