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
The court then decides whether to begin proceedings or throw out the application as unsubstantiated.
—
Sophie Tanno, CNN Money, 6 July 2025
Federal authorities have called Iran the world's largest state sponsor of terror, and the FBI says the Iranian government has both imprisoned Americans within its territory on unsubstantiated charges and harassed and even killed dissidents in exile.
—Michael Ruiz, FOXNews.com, 24 June 2025
The true story takes place in the 1950s, as Murrow came under fire for criticizing Sen. Joseph McCarthy, who levied unsubstantiated charges of communism at various Americans during the Cold War.
—Matt Webb Mitovich, TVLine, 10 June 2025
The 64-year-old MAGA loyalist has consistently promoted unsubstantiated claims about the 2020 presidential election being rigged against President Trump.
—Brian Niemietz, New York Daily News, 8 July 2025
See All Example Sentences for unsubstantiated
Sophie Tanno, CNN Money, 6 July 2025
Federal authorities have called Iran the world's largest state sponsor of terror, and the FBI says the Iranian government has both imprisoned Americans within its territory on unsubstantiated charges and harassed and even killed dissidents in exile.
—Michael Ruiz, FOXNews.com, 24 June 2025
The true story takes place in the 1950s, as Murrow came under fire for criticizing Sen. Joseph McCarthy, who levied unsubstantiated charges of communism at various Americans during the Cold War.
—Matt Webb Mitovich, TVLine, 10 June 2025
The 64-year-old MAGA loyalist has consistently promoted unsubstantiated claims about the 2020 presidential election being rigged against President Trump.
—Brian Niemietz, New York Daily News, 8 July 2025
See All Example Sentences for unsubstantiated
Recent Examples of Synonyms for unsubstantiated
Adjective
-
In making arrests, the federal government allegedly went against both immigration laws and the Fourth Amendment, which protects people from unreasonable searches and seizures by the government, the plaintiffs argue.—
Laura Rodríguez Presa,
Chicago Tribune,
14 July 2025
-
Medical device safety alert: issued in situations where a medical device may present an unreasonable risk of substantial harm.—
Marley Malenfant,
Austin American Statesman,
3 July 2025
Adjective
-
However, the cruise line says the claims are unfounded as the rule changes in question have been in place since February 2023, and items like clack fans that some users say are banned are just not allowed on indoor dance floors anymore.—
Thomas Westerholm,
MSNBC Newsweek,
17 July 2025
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But research and real-world experience show these fears are unfounded.—
Erika Villegas,
Chicago Tribune,
15 July 2025
Adjective
-
Manager engagement has dropped to just 27%, showing even leaders feel unsupported or disconnected.—
Chris Rosenberg,
Fortune,
20 July 2025
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Then there’s a twist and reveal that becomes a canonical betrayal completely unsupported by coherent motivation, and the whole gambit falls apart.—
Katie Walsh,
Twin Cities,
19 July 2025
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsubstantiated. Accessed 25 Jul. 2025.
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