unsubstantiated
adjective
\
Definition of unsubstantiated
: not proven to be true : not substantiated an unsubstantiated rumor/report a plausible but unsubstantiated theory
Keep scrolling for more
Synonyms & Antonyms for unsubstantiated
Synonyms
baseless, foundationless, groundless, invalid, nonvalid, unfounded, unreasonable, unsupported, unwarranted
Antonyms
good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded
Visit the Thesaurus for More
Examples of unsubstantiated in a Sentence
Recent Examples on the Web
Conspiracy theories, hoaxes and unsubstantiated news reports by anonymous online posters have increasingly run rampant on message boards such as 4chan and other dark corners of the Web in the wake of school shootings. — Drew Harwell, BostonGlobe.com, "Fake Facebook accounts and online lies multiply in hours after Santa Fe school shooting," 18 May 2018 Until someone says yes, unsubstantiated reports about coaches declining offers from UAA and UAF will continue to cast both programs in a bad light. — Beth Bragg, Anchorage Daily News, "Wanted: Coaches for Alaska college hockey teams that 2 years ago were on the chopping block," 19 Apr. 2018 In 2007, Gowler assigned Popkey to explore the unsubstantiated reports that Sen. Larry Craig was a homosexual. — idahostatesman, "About Us: 150 Years of News and Change | Idaho Statesman," 1 Aug. 2015 Luke Walton still has treadmarks on his back from LaVar’s wholly unsubstantiated claim that the young coach had lost the Lakers locker room. — Nancy Armour, USA TODAY, "LaVar Ball's latest bluster shows Los Angeles Lakers need to trade Lonzo Ball," 5 July 2018 Recent allegations by some that the natural gas industry is increasingly vulnerable to cyberattack are unsubstantiated and not based on any factual evidence. — Don Santa, Houston Chronicle, "Commentary: Administration’s action on coal, nuclear solves a problem that doesn’t exist," 5 July 2018 Most of the claims are unsubstantiated by careful medical studies and have become so blatant that the FDA has issued warnings to companies that make them. — NBC News, "FDA committee recommends first CBD oil product," 19 Apr. 2018 Cosby’s lawyers argue that the other accusers’ accusations are largely unsubstantiated and are not enough to meet the strict legal standard for allowing prosecutors to present evidence of a defendant’s prior bad conduct. — Washington Post, "Bill Cosby goes to court to stop accusers from testifying," 4 Mar. 2018 The implications of long-term consumption are unclear, and many of the health claims made about meal-replacement products are unsubstantiated. — The Economist, "The future of food, served up right here in augmented reality," 7 July 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unsubstantiated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Keep scrolling for more
Keep scrolling for more
Comments on unsubstantiated
What made you want to look up unsubstantiated? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Words from Greek and Roman Mythology Quiz
-
- Boreal comes from the name of the ancient Greek god of which wind?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
-
Words from Greek and Roman Mythology Quiz
A mythological/etymological mashup!
Take the quiz -
Great Scrabble Words—A Quiz
Words to improve your Scrabble game
Take the quiz -
Name That Thing
Test your visual vocabulary with our 10-question challenge!
Take the quiz -
SCRABBLE® Sprint
SCRABBLE® fans, sharpen your skills!
Play the game
Share unsubstantiated
Resources for unsubstantiated