unsubstantiated
Americanadjective
-
not substantiated; unproved or unverified.
unsubstantiated allegations.
-
being without form or substance.
adjective
Etymology
Origin of unsubstantiated
First recorded in 1765–75; un- 1 + substantiate + -ed 2
Vocabulary lists containing unsubstantiated
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Italy's government says the country's largest steel works must be converted to electric after a court-ordered shutdown of polluting furnaces but, as Rome seeks a buyer, critics say its plan is woefully unsubstantiated.
From Barron's ● Sep. 17, 2026
“The State AGs may call this a landmark case, but their limited claims are unsubstantiated and their financial demands are vastly disproportionate,” the company said in a statement on Thursday.
From Los Angeles Times ● Aug. 16, 2026
Critics in the 1970s made a similar argument about money market mutual funds, but those fears proved unsubstantiated.
From The Wall Street Journal ● Aug. 7, 2026
Monroe’s personal legacy is like a charm bracelet hung with more unsubstantiated rumors than genuine facts, but one undeniable trait was her thirst to defy the world’s expectations.
From Salon ● Jul. 6, 2026
An unsubstantiated report alleges that a Ridgeback carried off a whale calf off the coast of Norway in 1802.
From "Fantastic Beasts and Where to Find Them" by J.K. Rowling
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
