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
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated claim that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—
Sam McNeil, Arkansas Online, 24 Feb. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated allegation that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—ABC News, 23 Feb. 2026
As Shell retreated to handle the fallout with his family, other claims that arose of inappropriate behavior by the exec proved unsubstantiated.
—Dominic Patten, Deadline, 23 Feb. 2026
Some of the allegations surrounding the owner, known as Ethan Phillips, remain unsubstantiated.
—Dac Collins, Outdoor Life, 19 Feb. 2026
See All Example Sentences for unsubstantiated
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Sam McNeil, Arkansas Online, 24 Feb. 2026
Hungarian Prime Minister Viktor Orbán doubled down Monday on an unsubstantiated allegation that Ukraine is deliberately holding back shipments of Russian oil, and accused Kyiv of seeking to topple his government.
—ABC News, 23 Feb. 2026
As Shell retreated to handle the fallout with his family, other claims that arose of inappropriate behavior by the exec proved unsubstantiated.
—Dominic Patten, Deadline, 23 Feb. 2026
Some of the allegations surrounding the owner, known as Ethan Phillips, remain unsubstantiated.
—Dac Collins, Outdoor Life, 19 Feb. 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 11 Mar. 2026.
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