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
Lawyers for San Diego County have largely rejected the allegations as unfounded — except for complaints that the Sheriff’s Office had not fully complied with provisions of the federal Americans with Disabilities Act in housing and caring for people in custody.
—
Jeff McDonald, San Diego Union-Tribune, 21 July 2025
That fear is not unfounded: New Yorkers are far more likely to get hit by a car than shot by a gun.
—Roger Cost, New York Daily News, 19 July 2025
That has not stopped unfounded conspiracy theories from spreading, mainly in extremist social media circles.
—Alex Harris, Miami Herald, 16 July 2025
Still, any rumors of a falling-out with Sánchez appear to be unfounded.
—Heather Hunter, The Washington Examiner, 30 July 2025
See All Example Sentences for unfounded
Jeff McDonald, San Diego Union-Tribune, 21 July 2025
That fear is not unfounded: New Yorkers are far more likely to get hit by a car than shot by a gun.
—Roger Cost, New York Daily News, 19 July 2025
That has not stopped unfounded conspiracy theories from spreading, mainly in extremist social media circles.
—Alex Harris, Miami Herald, 16 July 2025
Still, any rumors of a falling-out with Sánchez appear to be unfounded.
—Heather Hunter, The Washington Examiner, 30 July 2025
See All Example Sentences for unfounded
Recent Examples of Synonyms for unfounded
Adjective
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The policy and specialist support environment is going to need to become more sophisticated, and more responsive to balancing needs and addressing conflict, unfairness and unreasonable requests / restrictions.—
Nancy Doyle,
Forbes.com,
6 Aug. 2025
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Timothy Mousseau, a biologist at the University of South Carolina who studies organisms and ecosystems in radioactive regions, told the Times that the DOE's explanation that the wasps gathered legacy contamination for their homes is not unreasonable.—
Beth Mole,
ArsTechnica,
4 Aug. 2025
Adjective
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The totally groundless firing of Dr. Erika McEntarfer, my successor as Commissioner of Labor Statistics at BLS, sets a dangerous precedent and undermines the statistical mission of the Bureau.—
Anna Commander,
MSNBC Newsweek,
2 Aug. 2025
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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
Adjective
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Experts advise looking for certifications, questioning unsubstantiated language and visuals, and conducting an online search for a product and company to learn about how goods are made and whether there is evidence for what the company says.—
Riane Lumer,
CNN Money,
7 Aug. 2025
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In subsequent social media posts and in comments to reporters, Trump has made unsubstantiated claims about the BLS process for conducting and revising jobs reports and the political motivations of McEntarfer in order to benefit Democrats and undermine Republicans.—
Isabella Murray,
ABC News,
5 Aug. 2025
Cite this Entry
“Unfounded.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unfounded. Accessed 21 Aug. 2025.
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