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Showing results for unreasonable. Search instead for un reasonable.
Definitions

unreasonable

[uhn-ree-zuh-nuh-buhl, -reez-nuh-] / ʌnˈri zə nə bəl, -ˈriz nə- /
ADJECTIVE
not logical or sensible
Synonyms
STRONGEST
absurd arbitrary biased contradictory foolish illogical inconsistent irrational preposterous senseless silly stupid wrong
WEAK
all wet capricious erratic fallacious far-fetched full of hot air headstrong incoherent incongruous inconsequential invalid loose mad nonsensical off the wall opinionated quirky reasonless thoughtless unreasoned vacant
Antonyms
STRONGEST
circumspect consistent correct intelligent logical rational reasonable right sensible serious wise
WEAK
cheap economical low plain practical pragmatic realistic
ADJECTIVE
extravagant; beyond normal limits
Synonyms
STRONGEST
arbitrary excessive exorbitant extreme illegitimate improper inordinate senseless unconscionable undue unfair unjust unjustifiable unlawful unwarranted wrongful
WEAK
absonant costing an arm and a leg dear extortionate far-out immoderate intemperate out of bounds overkill overmuch peremptory posh pricey steep stiff too great too much too-too uncalled-for unrightful unwarrantable up to here way-out
Antonyms
STRONGEST
authorized decent ethical fair good just justifiable legal moderate moral rational reasonable right sensible unprejudiced warranted
WEAK
cheap economical logical low plain practical pragmatic realistic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s not unreasonable for drivers to be upset about high fuel prices and for policymakers to want to tackle the issue.

From MarketWatch • Apr. 1, 2026

It isn’t unreasonable to expect returns of over 50% by the end of this year.

From Barron's • Mar. 19, 2026

This was hardly unreasonable; 23 nations operate nuclear power programs by importing enriched uranium.

From The Wall Street Journal • Mar. 1, 2026

California’s elderly parole program generally considers the release of prisoners who are older than 50 and have been incarcerated for at least 20 continuous years, considering whether someone poses an unreasonable risk to public safety.

From Los Angeles Times • Feb. 27, 2026

She became as restless as he was, more unreasonable, and much more cruel.

From "The Once and Future King" by T. H. White

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.