as in unreasonable
having no basis in reason or fact
a careful investigation proved that the charges were foundationless
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
Recent Examples of Synonyms for foundationless
Adjective
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The Fourth Amendment protects people against unreasonable searches and seizures.—
Eve Chen,
USA Today,
6 Feb. 2026 -
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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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
Adjective
-
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
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Cite this Entry
“Foundationless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foundationless. Accessed 14 Feb. 2026.
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