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

Example Sentences

Recent Examples of irrational

Now comes a cataclysm in the country’s foremost blue state that is traceable, in part, to irrational progressive priorities and may prove a millstone around the neck of one of the foremost talents on the Democratic bench, California governor Gavin Newsom. —Rich Lowry, National Review, 15 Jan. 2025

Every moment is a battle to keep his budget, to get things done without causing injuries or irreparable insult, and to capture this story for the screen without losing his mind or angering the rabid, irrational fanbase. —Kathryn Vanarendonk, Vulture, 23 Dec. 2024

When Muriel arrives to help with the drive-in setup, the ladies fill her in on Hope’s irrational hostility toward Love Story’s cancer story line. —Sara Netzley, EW.com, 19 Dec. 2024

As far back as JFK, U.S. officials have been trapped in this irrational family feud that empowers hardliners in both governments while holding citizens here and there hostage to a bureaucratic status quo. —Lissa Weinmann, Orlando Sentinel, 4 Jan. 2025