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
Pulte's allegations against Cook closely echo similar unsubstantiated claims against other top Democrats.
—
Steve Kopack, NBC news, 28 Aug. 2025
ByteDance has denied these claims, which remain unsubstantiated.
—Kinsey Crowley, USA Today, 27 Aug. 2025
The deportations – part of a program Iran announced in March – radically increased in the days after Iran’s conflict with Israel, fueled by unsubstantiated claims that Afghans had spied for Israel prior to and during the attacks.
—Rhea Mogul, CNN Money, 20 Aug. 2025
The president on Monday revived his years-long and unsubstantiated charges that voting by mail leads to election fraud, advocating the elimination of mail-in ballots in states, along with the use of voting machines.
—Kristina Karisch, The Hill, 19 Aug. 2025
See All Example Sentences for unsubstantiated
Steve Kopack, NBC news, 28 Aug. 2025
ByteDance has denied these claims, which remain unsubstantiated.
—Kinsey Crowley, USA Today, 27 Aug. 2025
The deportations – part of a program Iran announced in March – radically increased in the days after Iran’s conflict with Israel, fueled by unsubstantiated claims that Afghans had spied for Israel prior to and during the attacks.
—Rhea Mogul, CNN Money, 20 Aug. 2025
The president on Monday revived his years-long and unsubstantiated charges that voting by mail leads to election fraud, advocating the elimination of mail-in ballots in states, along with the use of voting machines.
—Kristina Karisch, The Hill, 19 Aug. 2025
See All Example Sentences for unsubstantiated
Recent Examples of Synonyms for unsubstantiated
Adjective
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Russia is trying to paint Ukraine as the unreasonable party in negotiations, Ferris said.—
Lauren Kent,
CNN Money,
12 Sep. 2025
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Darryl Morin, national president of Forward Latino, a Latino advocacy group based in Franklin, Wisconsin, said the decision erodes Fourth Amendment protections against unreasonable search and seizure.—
Francesca Pica,
jsonline.com,
9 Sep. 2025
Adjective
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Meanwhile, a growing body of research found that police regularly performed inadequate rape investigations, deciding reports were unfounded before interviewing witnesses, collecting evidence or testing DNA.—
Willoughby Mariano,
ProPublica,
11 Sep. 2025
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The classic Stern misdirect briefly confused listeners and leaned into the unfounded rumors that SiriusXM wasn't planning to renew Stern’s current five-year contract, which expires in December.—
Melissa Ruggieri,
USA Today,
9 Sep. 2025
Adjective
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Trump continues to make baseless claims about widespread noncitizen voting, has attempted to change voter registration rules to include proof-of-citizenship requirements, and has directed the Justice Department to prioritize prosecuting noncitizens who register or vote.—
Miles Parks,
NPR,
10 Sep. 2025
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The progressive fear that the Abundance movement wants to take over the Democratic Party isn’t baseless at all — its adherents have plenty of influence in it now.—
David Weigel,
semafor.com,
8 Sep. 2025
Adjective
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The company's Extended Security Updates (ESU) program provides critical and important security updates for unsupported OSes, but does not include new features, bug fixes, or technical support.—
PC Magazine,
PC Magazine,
15 Sep. 2025
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Many Intel Macs still have between one and three years of security update support left; for unsupported Macs, your best bet is probably to keep using your older but officially supported macOS version for as long as it's patched.—
ArsTechnica,
ArsTechnica,
15 Sep. 2025
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsubstantiated. Accessed 18 Sep. 2025.
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