unreasonable

adjective

ˌən-ˈrēz-nə-bəl
Definition of unreasonablenext
1
as in irrational
having no basis in reason or fact an unreasonable assumption

Synonyms & Similar Words

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Antonyms & Near Antonyms
2
as in unreasoning
not using or following good reasoning an unreasonable respect for a man who did not deserve it

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of unreasonable Recalls are issued when vehicle owners, regulators, or manufacturers determine that a potentially faulty component presents an unreasonable safety risk or fails to meet specified standards. — Jim Gorzelany, Forbes.com, 31 July 2026 There are many algorithms for which it has been mathematically proven that a quantum computer can generate results that would take a classical computer an unreasonable amount of time to generate. — ArsTechnica, 30 July 2026 From the second Eldridge was drafted, a little devil appeared on your shoulder and whispered unreasonable expectations into your ear. — Grant Brisbee, New York Times, 13 July 2026 In a poll on the post, 95% voted that this parent is NOT being unreasonable. — Melissa Willets, Parents, 12 July 2026 See All Example Sentences for unreasonable
Recent Examples of Synonyms for unreasonable
  1. irrational
  2. unreasoning
  3. unwarranted
  4. illegitimate
  5. unfounded
  6. baseless
  7. unsupported
  8. invalid
Adjective
  • The policy is particularly irrational when applied to bicyclists and pedestrians.
    — Jeffrey T. Donner, The Orlando Sentinel, 9 Aug. 2026
  • For all the film focuses on Carlson’s irrational attempts to peg the murder on gay people, the actual gay man Tom disappears from the narrative for long periods of time.
    — Alison Foreman, IndieWire, 31 July 2026
Definition of irrational
Adjective
  • But in each event—in the living act, the undoubted deed—there, some unknown but still reasoning thing puts forth the mouldings of its features from behind the unreasoning mask.
    — Literary Hub, Literary Hub, 6 July 2026
  • Roosevelt surely understood that nameless, unreasoning, unjustified fear cannot be eradicated.
    — New York Times, New York Times, 9 June 2026
Definition of unreasoning
Adjective
  • Today’s blog post further claimed that Old Reddit is leading to unwarranted content scraping.
    — Scharon Harding, ArsTechnica, 5 Aug. 2026
  • Furthermore, integrated video and POS data protect employees by quickly disproving false customer claims or unwarranted liability disputes.
    — Robert Messer, Forbes.com, 31 July 2026
Definition of unwarranted
Adjective
  • But that’s forcing them to wrestle with the idea that any action taken by a party is illegitimate, anti-democratic rigging — something the other team can use to depress the base.
    — David Weigel, semafor.com, 22 July 2026
  • Signature-matching efforts sometimes disqualify more legitimate than illegitimate ballots.
    — Jeremy Kohler, ProPublica, 15 July 2026
Definition of illegitimate
Adjective
  • Second, in some cases, state law doesn't allow DOI to see the record at all, including cases ACS determined to be unfounded.
    — Alice Gainer, CBS News, 31 July 2026
  • That speculation, however, proved to be unfounded, and BeBe ultimately placed third on the season overall.
    — Joey Nolfi, Entertainment Weekly, 31 July 2026
Definition of unfounded
Adjective
  • Judge Lebovits ruled in favor with the Times according to New York State’s Anti-SLAPP law, which protects against baseless legal proceedings stemming from attempts to stifle the press or free speech.
    — Fran Hoepfner, Vulture, 28 July 2026
  • Trump’s narrow loss in Arizona in 2020 and his subsequent — and baseless — insistence that fraud accounted for the defeat has fueled an election denialism that Arizona voters have rarely rewarded.
    — Arizona Republic, AZCentral.com, 21 July 2026
Definition of baseless
Adjective
  • Paul argued Fauci using the Fifth Amendment was unsupported because former President Joe Biden, whom Fauci advised during the pandemic, pardoned him.
    — Scott Thompson, FOXNews.com, 3 Aug. 2026
  • Sherrill rejected that request Tuesday, calling it unsupported by law.
    — Kaelan Deese, The Washington Examiner, 30 July 2026
Definition of unsupported
Adjective
  • The government maintains that the request for class certification came too late and is invalid anyway.
    — Kevin Breuninger, CNBC, 5 Aug. 2026
  • Kenzo had inclined his head over his invalid daughter and was staring at her intently.
    — Cynthia Zarin, Harpers Magazine, 4 Aug. 2026
Definition of invalid

Browse Nearby Words

unreason
unreasonable
unreasonableness
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Cite this Entry

“Unreasonable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unreasonable. Accessed 13 Aug. 2026.

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More from Merriam-Webster on unreasonable

Nglish: Translation of unreasonable for Spanish Speakers

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