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 number of people missing since the July 4 floods in Texas dropped to three this weekend as authorities recovered victims, located those who turned out to be safe, and unmasked a few unsubstantiated or falsified reports, officials said.
—
Theresa Braine, New York Daily News, 20 July 2025
The Warrens, and later Spera, were fond of recounting a macabre (albeit unsubstantiated) tale about a museum guest who spurned their warnings and taunted Annabelle.
—Declan Gallagher, EW.com, 16 July 2025
The Federal Trade Commission has been cracking down on false or unsubstantiated marketing around such claims in recent years, forcing some companies to pay thousands, if not millions, of dollars for misleading consumers.
—Bailey Schulz, USA Today, 11 July 2025
Sullivan criticized the state’s oversight of nursing homes, saying inspectors take too long to respond and find the majority of complaints to be unsubstantiated.
—Robert McCoppin, Chicago Tribune, 7 July 2025
See All Example Sentences for unsubstantiated
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Theresa Braine, New York Daily News, 20 July 2025
The Warrens, and later Spera, were fond of recounting a macabre (albeit unsubstantiated) tale about a museum guest who spurned their warnings and taunted Annabelle.
—Declan Gallagher, EW.com, 16 July 2025
The Federal Trade Commission has been cracking down on false or unsubstantiated marketing around such claims in recent years, forcing some companies to pay thousands, if not millions, of dollars for misleading consumers.
—Bailey Schulz, USA Today, 11 July 2025
Sullivan criticized the state’s oversight of nursing homes, saying inspectors take too long to respond and find the majority of complaints to be unsubstantiated.
—Robert McCoppin, Chicago Tribune, 7 July 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 3 Aug. 2025.
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