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.
Grad didn’t offer evidence of his claim, and the theory remains publicly unsubstantiated. Larry Holder, New York Times, 26 Mar. 2025 Trump and his billionaire adviser Elon Musk have fueled fears of cuts to Social Security with their unsubstantiated rhetoric about fraud within the agency. The Hill, 25 Mar. 2025 The department noted there are no records of visits to the Sullivan home on file because reports of neglect and abuse that are unsubstantiated are expunged from its system after five years. Peter D'abrosca, Fox News, 21 Mar. 2025 Regardless, despite unsubstantiated trade rumors, questions about his in-season podcast and other off-field issues such as not showing up for voluntary offseason workouts, Parsons is going to get a pay day. Nick Harris, Fort Worth Star-Telegram, 20 Mar. 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 16 Apr. 2025.

More from Merriam-Webster on unsubstantiated

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