as in unreasonable
having no basis in reason or fact
please stop making groundless accusations against innocent people fears of a strike proved groundless
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Recent Examples of groundless
Earlier this week, Sulton said the new criminal case is groundless and accused prosecutors of bringing additional charges because Spencer rejected a plea deal on the first case.
—
Vanessa Swales, jsonline.com, 17 Oct. 2025
The most extreme version of this debate over Kirk’s views on Israel emerged with shocking velocity after his death, in the form of groundless claims that he’d been killed by the Israelis.
—Ben Smith, semafor.com, 15 Sep. 2025
These radically groundless and unfounded allegations end now.
—Lea Veloso, StyleCaster, 11 Sep. 2025
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
See All Example Sentences for groundless
Vanessa Swales, jsonline.com, 17 Oct. 2025
The most extreme version of this debate over Kirk’s views on Israel emerged with shocking velocity after his death, in the form of groundless claims that he’d been killed by the Israelis.
—Ben Smith, semafor.com, 15 Sep. 2025
These radically groundless and unfounded allegations end now.
—Lea Veloso, StyleCaster, 11 Sep. 2025
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
See All Example Sentences for groundless
Recent Examples of Synonyms for groundless
Adjective
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The Fourth Amendment protects people against unreasonable searches and seizures.—
Eve Chen,
USA Today,
6 Feb. 2026
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Those are clear violations of the Fourth Amendment’s safeguards against unreasonable searches and seizures, which were adopted to prevent the exercise of arbitrary government power.—
Yohuru Williams,
The Conversation,
4 Feb. 2026
Adjective
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Public health experts also criticized the president for making unfounded claims about highly politicized health issues.—
Arkansas Online,
Arkansas Online,
9 Feb. 2026
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Concerns about the validity of the ransom note are not unfounded.—
Hannah Fry,
Los Angeles Times,
9 Feb. 2026
Adjective
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Trump has repeatedly made baseless claims that there was voter fraud in the 2020 election, specifically in Georgia, that contributed to his election loss to Biden.—
Isabella Murray,
ABC News,
5 Feb. 2026
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There are so many reasons to be mad; the mostly baseless and endless attacks on higher education, the dismantling of life-saving research, ICE, the subverting of policy that redresses shameful social harms.—
Wendy Nelson Espeland,
Chicago Tribune,
3 Feb. 2026
Cite this Entry
“Groundless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/groundless. Accessed 15 Feb. 2026.
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