unsubstantiated
adjective
un·sub·stan·ti·at·ed
ˌən-səb-ˈstan(t)-shē-ˌā-təd 
: 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
Overwhelmingly, those cases stem from reports later found to be false or unsubstantiated.
—
James R Mason, Hartford Courant, 12 May 2026
Judge Walgren’s responses to these allegations were measured and appropriate in the face of unsubstantiated allegations.
—Rafael Perez, Daily News, 7 May 2026
Trump condemned Roberts and the five other justices who ruled against him on tariffs and made an unsubstantiated claim that the court was swayed by foreign interests.
—Andrew Chung, USA Today, 7 May 2026
The $250 million lawsuit alleged that the newspaper irresponsibly reported on Lively’s unsubstantiated allegations.
—Victoria Bekiempis, Vulture, 4 May 2026
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James R Mason, Hartford Courant, 12 May 2026
Judge Walgren’s responses to these allegations were measured and appropriate in the face of unsubstantiated allegations.
—Rafael Perez, Daily News, 7 May 2026
Trump condemned Roberts and the five other justices who ruled against him on tariffs and made an unsubstantiated claim that the court was swayed by foreign interests.
—Andrew Chung, USA Today, 7 May 2026
The $250 million lawsuit alleged that the newspaper irresponsibly reported on Lively’s unsubstantiated allegations.
—Victoria Bekiempis, Vulture, 4 May 2026
See All Example Sentences for unsubstantiated
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsubstantiated. Accessed 13 May. 2026.
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