as in unreasonable
having no basis in reason or fact
an unsubstantiated claim that was thrown out of court
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Recent Examples of unsubstantiated
For years, unsubstantiated speculation circulated publicly tying Smith’s death to members of the Murdaugh family.
—
Stepheny Price, FOXNews.com, 11 Mar. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated claim that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—Sam McNeil, Arkansas Online, 24 Feb. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated allegation that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—ABC News, 23 Feb. 2026
As Shell retreated to handle the fallout with his family, other claims that arose of inappropriate behavior by the exec proved unsubstantiated.
—Dominic Patten, Deadline, 23 Feb. 2026
See All Example Sentences for unsubstantiated
Stepheny Price, FOXNews.com, 11 Mar. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated claim that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—Sam McNeil, Arkansas Online, 24 Feb. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated allegation that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—ABC News, 23 Feb. 2026
As Shell retreated to handle the fallout with his family, other claims that arose of inappropriate behavior by the exec proved unsubstantiated.
—Dominic Patten, Deadline, 23 Feb. 2026
See All Example Sentences for unsubstantiated
Recent Examples of Synonyms for unsubstantiated
Adjective
-
Chicago residents must not be subject to unreasonable searches and seizures.—
Tracy Baim,
Chicago Tribune,
29 Mar. 2026
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As in Williams’ case, attorneys argued that a sweep had violated the plaintiffs’ Fourth Amendment rights protecting them from unreasonable search and seizure, as well as their 14th Amendment right to due process.—
Ariane Lange,
Sacbee.com,
24 Mar. 2026
Adjective
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Local election officials told the county Board of Supervisors last month that the complaint was unfounded.—
ABC News,
ABC News,
31 Mar. 2026
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The lesion that was removed from his brain is from the part of the brain that causes moments of unfounded fear.—
Gary Bedore,
Kansas City Star,
29 Mar. 2026
Adjective
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The states argue the data collection risks invading student privacy, and leads to baseless investigations of colleges and universities.—
CBS News,
CBS News,
4 Apr. 2026
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The Maryland Civil Rights Commission could mirror Colorado’s, bringing baseless cases against religious schools that refuse to acquiesce to mainstream culture, especially beliefs on sexuality and gender.—
Stephen Mitchell,
Baltimore Sun,
2 Apr. 2026
Adjective
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Of the 66 adverse effects listed on statin product labels, 62 were unsupported by the trial evidence.—
Vikas Patel,
STAT,
3 Apr. 2026
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Many taller sleepers struggle with standard mattress lengths that leave their feet unsupported.—
Jason Phillips,
USA Today,
25 Mar. 2026
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsubstantiated. Accessed 6 Apr. 2026.
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