as in unreasonable
having no basis in reason or fact
the accusation proved to be unfounded
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Recent Examples of unfounded
The suit was filed in response to unfounded claims aired by the network that Dominion helped rig the 2020 election against Mr. Trump.
—
Melissa Quinn
june 27, CBS News, 27 June 2025
Multiple research studies, however, have found that any concern that thimerosal causes autism is unfounded.
—Emily Kay Votruba, EverydayHealth.com, 27 June 2025
Simultaneously, Abbott pandered to unfounded claims that undocumented immigrants were responsible for the pandemic surge.
—Literary Hub, 26 June 2025
Zillow has disputed Compass’ characterization, stating that the lawsuit is unfounded and the new rule was enacted in the spirit of fairness.
—Samantha Delouya, CNN Money, 23 June 2025
See All Example Sentences for unfounded
Melissa Quinn
june 27, CBS News, 27 June 2025
Multiple research studies, however, have found that any concern that thimerosal causes autism is unfounded.
—Emily Kay Votruba, EverydayHealth.com, 27 June 2025
Simultaneously, Abbott pandered to unfounded claims that undocumented immigrants were responsible for the pandemic surge.
—Literary Hub, 26 June 2025
Zillow has disputed Compass’ characterization, stating that the lawsuit is unfounded and the new rule was enacted in the spirit of fairness.
—Samantha Delouya, CNN Money, 23 June 2025
See All Example Sentences for unfounded
Recent Examples of Synonyms for unfounded
Adjective
-
In making arrests, the federal government allegedly went against both immigration laws and the Fourth Amendment, which protects people from unreasonable searches and seizures by the government, the plaintiffs argue.—
Laura Rodríguez Presa,
Chicago Tribune,
14 July 2025
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Medical device safety alert: issued in situations where a medical device may present an unreasonable risk of substantial harm.—
Marley Malenfant,
Austin American Statesman,
3 July 2025
Adjective
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Putin talks with Iranian foreign minister Russian President Vladimir Putin on Monday told Iranian Foreign Minister Abbas Araqchi in Moscow that aggression against Iran was groundless.—
Susan Miller,
USA Today,
24 June 2025
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The site has a history of promoting groundless conspiracy theories.—
Tom Dreisbach,
NPR,
20 Feb. 2025
Adjective
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The 64-year-old MAGA loyalist has consistently promoted unsubstantiated claims about the 2020 presidential election being rigged against President Trump.—
Brian Niemietz,
New York Daily News,
8 July 2025
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Social media was running wild with videos and photos of Carrington’s fingers hitting Clark in the eye, with unsubstantiated claims and insinuations that Carrington had tried to injure Clark.—
Christine Brennan,
CNN Money,
6 July 2025
Cite this Entry
“Unfounded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfounded. Accessed 19 Jul. 2025.
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