unsubstantiated

adjective

un·​sub·​stan·​ti·​at·​ed ˌən-səb-ˈstan(t)-shē-ˌā-təd How to pronounce unsubstantiated (audio)
: not proven to be true : not substantiated
an unsubstantiated rumor/report
a plausible but unsubstantiated theory

Examples of unsubstantiated in a Sentence

an unsubstantiated claim that was thrown out of court
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
It's been marked by inaccuracies, miscalculations and unsubstantiated claims of budget cutting. Graham Kates, CBS News, 27 Feb. 2025 The Trump Administration's DOGE has made unsubstantiated claims of high levels of Social Security fraud, and has initiated federal worker layoffs could exacerbate existing staffing issues at the Social Security Administration. David Faris, Newsweek, 27 Feb. 2025 Armed with that platform, Bongino castigated Covid-19 mandates, pushed unsubstantiated claims that Democrats stole the 2020 election, and promoted the America First creed. Eric Cortellessa, TIME, 24 Feb. 2025 At issue were Community Notes added to tweets about President Trump's unsubstantiated claim that Ukraine President Volodymyr Zelensky’s approval rating was just 4%. Jibin Joseph, PCMAG, 24 Feb. 2025 See All Example Sentences for unsubstantiated

Word History

First Known Use

circa 1775, in the meaning defined above

Time Traveler
The first known use of unsubstantiated was circa 1775

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Cite this Entry

“Unsubstantiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsubstantiated. Accessed 5 Mar. 2025.

More from Merriam-Webster on unsubstantiated

Last Updated: - Updated example sentences
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