unreasonable

adjective

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

Synonyms & Similar Words

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Antonyms & Near Antonyms
2
as in irrational
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 In such an environment, Fundstrat’s Tom Lee has argued that the S & P 500 can climb to 8,000 over the next few weeks, a level that is not too unreasonable given that the broader index was last trading around 7,750 — only 3% away. — Sarah Min, CNBC, 7 Aug. 2026 Which is not entirely unreasonable given this very specific set of circumstances. — Brian Grubb, Vulture, 3 Aug. 2026 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 See All Example Sentences for unreasonable
Recent Examples of Synonyms for unreasonable
  1. unwarranted
  2. irrational
  3. unfounded
  4. unreasoning
  5. baseless
  6. illegitimate
  7. unsupported
  8. groundless
Adjective
  • At 79, Levy has been pleased to discover that often his discomfort is unwarranted.
    — Matthew Jacobs, HollywoodReporter, 17 Aug. 2026
  • Today’s blog post further claimed that Old Reddit is leading to unwarranted content scraping.
    — Scharon Harding, ArsTechnica, 5 Aug. 2026
Definition of unwarranted
Adjective
  • But the question remained unsolved for polygons with irrational angles.
    — Sam Macdonald, Scientific American, 14 Aug. 2026
  • As a result, the argument goes, today's spending is irrational because the hardware would need to be replaced too frequently to generate an attractive return on investment, known as ROI.
    — , CNBC, 12 Aug. 2026
Definition of irrational
Adjective
  • The investigating officers in the 2012 Delray Beach incident determined the allegations against Caruso to be unfounded, according to police records, after the child did not tell them about any untoward incident in interviews.
    — Claire Heddles, Miami Herald, 20 Aug. 2026
  • Based on the data, 71% of the 485 grievances were deemed as unfounded or rejected by detention center officials.
    — Vanessa Romo, NPR, 20 Aug. 2026
Definition of unfounded
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
  • How sad that aiding much healthier and happier living comes with baseless lawsuits.
    — John Tamny, Forbes.com, 18 Aug. 2026
  • 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
Definition of baseless
Adjective
  • Internet discussions portrayed the SPLC as a politically motivated or illegitimate actor.
    — Art Jipson, The Conversation, 20 Aug. 2026
  • Holding an incomplete vote, or one that feeds into any narrative of the winner being illegitimate, would be a tremendous gift to Moscow.
    — Nick Paton Walsh, CNN Money, 19 Aug. 2026
Definition of illegitimate
Adjective
  • The feedback is often vague, unsupported by concrete examples and disconnected from anything the employee could have reasonably corrected earlier.
    — Lauren Russell, Forbes.com, 18 Aug. 2026
  • 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
Definition of unsupported
Adjective
  • For Rocha, however, the claims examined in the documentary are groundless — and tiring.
    — Johnny Dodd, PEOPLE, 15 July 2026
  • But too often groundless complaints are filed concerning behavior that was an unremarkable part of growing up just a generation ago.
    — Editorial, Boston Herald, 21 May 2026
Definition of groundless

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 25 Aug. 2026.

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