as in unreasonable
having no basis in reason or fact
the accusation proved to be unfounded
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Example Sentences
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Recent Examples of unfounded
Police said reports of a fourth shooting of a woman in Over-the-Rhine were unfounded.
—
David Ferrara, The Enquirer, 2 July 2025
The recommendation also reinforces longstanding, unfounded fears that the substance can lead to developmental disabilities, such as autism.
—Annika Kim Constantino,ashley Capoot, CNBC, 1 July 2025
Rumors that the movie’s co-star John Malkovich might put in an appearance proved unfounded, but this did nothing to dampen a lively Q&A with Frears and Hampton on their quest to bring Dangerous Liaisons to the big screen.
—Melanie Goodfellow, Deadline, 30 June 2025
In each of those previous cases, there were red flags, health concerns with Butler that proved unfounded, athleticism and shooting concerns with Winslow that proved prescient.
—Ira Winderman, Sun Sentinel, 26 June 2025
See All Example Sentences for unfounded
David Ferrara, The Enquirer, 2 July 2025
The recommendation also reinforces longstanding, unfounded fears that the substance can lead to developmental disabilities, such as autism.
—Annika Kim Constantino,ashley Capoot, CNBC, 1 July 2025
Rumors that the movie’s co-star John Malkovich might put in an appearance proved unfounded, but this did nothing to dampen a lively Q&A with Frears and Hampton on their quest to bring Dangerous Liaisons to the big screen.
—Melanie Goodfellow, Deadline, 30 June 2025
In each of those previous cases, there were red flags, health concerns with Butler that proved unfounded, athleticism and shooting concerns with Winslow that proved prescient.
—Ira Winderman, Sun Sentinel, 26 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
-
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
-
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 24 Jul. 2025.
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