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
Russia’s unsubstantiated claims that NATO is plotting armed provocations against Transnistria could be a pretext for Moscow’s meddling in Moldova, raising concerns about further military aggression in the region.
—
Brendan Cole, MSNBC Newsweek, 25 Sep. 2025
Their reporting is full of unsubstantiated claims and clearly aims at destroying the agency which, at its heart, has provi[ded] education and health care in place where no one else actually wants to work with a group of people that is one of the most vulnerable in the region.
—Benjamin Weinthal, FOXNews.com, 19 Sep. 2025
These are unsubstantiated allegations.
—Sam Gillette, PEOPLE, 19 Sep. 2025
Trump promised during the 2024 presidential campaign to release the files in their entirety and Patel before taking the FBI job had pushed unsubstantiated claims about who was in them.
—Luke Barr, ABC News, 16 Sep. 2025
See All Example Sentences for unsubstantiated
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Brendan Cole, MSNBC Newsweek, 25 Sep. 2025
Their reporting is full of unsubstantiated claims and clearly aims at destroying the agency which, at its heart, has provi[ded] education and health care in place where no one else actually wants to work with a group of people that is one of the most vulnerable in the region.
—Benjamin Weinthal, FOXNews.com, 19 Sep. 2025
These are unsubstantiated allegations.
—Sam Gillette, PEOPLE, 19 Sep. 2025
Trump promised during the 2024 presidential campaign to release the files in their entirety and Patel before taking the FBI job had pushed unsubstantiated claims about who was in them.
—Luke Barr, ABC News, 16 Sep. 2025
See All Example Sentences for unsubstantiated
Cite this Entry
“Unsubstantiated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsubstantiated. Accessed 9 Oct. 2025.
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