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
The push for peptides (both in injectable and non-injectable forms) has accelerated in recent years as influencers and manufacturers alike tout myriad benefits, many unsubstantiated by research.
—
Mary Walrath-Holdridge, USA Today, 1 Apr. 2026
March 26, 2026 The MyPillow founder and right-wing politico has been sued numerous times for pushing unsubstantiated claims about alleged fraud in the 2020 presidential election.
—Brian Niemietz, New York Daily News, 27 Mar. 2026
Kern recently founded the Hoosier Enquirer, an independent news website that has leveled unsubstantiated allegations of election fraud against Sweeney Bell.
—Jordan Smith, IndyStar, 26 Mar. 2026
The mall was previously evacuated in years past for a nearby fire and an unsubstantiated threat.
—Sarah Bahari, Dallas Morning News, 25 Mar. 2026
See All Example Sentences for unsubstantiated
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Mary Walrath-Holdridge, USA Today, 1 Apr. 2026
March 26, 2026 The MyPillow founder and right-wing politico has been sued numerous times for pushing unsubstantiated claims about alleged fraud in the 2020 presidential election.
—Brian Niemietz, New York Daily News, 27 Mar. 2026
Kern recently founded the Hoosier Enquirer, an independent news website that has leveled unsubstantiated allegations of election fraud against Sweeney Bell.
—Jordan Smith, IndyStar, 26 Mar. 2026
The mall was previously evacuated in years past for a nearby fire and an unsubstantiated threat.
—Sarah Bahari, Dallas Morning News, 25 Mar. 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 4 Apr. 2026.
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