substantiate
Americanverb (used with object)
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substantiates,
present (3rd person singular)
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substantiated,
past participle, past
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substantiating
present participle
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to establish by proof or competent evidence.
to substantiate a charge.
-
to give substantial existence to.
to substantiate an idea through action.
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to affirm as having substance; give body to; strengthen.
to substantiate a friendship.
verb
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to establish as valid or genuine
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to give form or real existence to
Other Word Forms
Derived Forms
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substantiationnoun
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substantiatornoun
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resubstantiateverb (used with object)
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substantiatableadjective
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substantiativeadjective
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unsubstantiatableadjective
Inflected Forms
Participles
Conjugated Forms
Present
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substantiatesimple
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substantiatessimple
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have substantiatedperfect
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has substantiatedperfect
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am substantiatingprogressive
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are substantiatingprogressive
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is substantiatingprogressive
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have been substantiatingperfect progressive
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has been substantiatingperfect progressive
Past
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substantiatedsimple
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had substantiatedperfect
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was substantiatingprogressive
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were substantiatingprogressive
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had been substantiatingperfect progressive
Future
Etymology
Origin of substantiate
First recorded in 1650–60; from New Latin substantiātus (past participle of substantiāre ), equivalent to Latin substanti(a) substance + -ātus -ate 1
Explanation
To substantiate is to give support to a claim. We’d really like to believe in the Tooth Fairy; however, more evidence is needed to substantiate her existence (besides that quarter in your pocket). Substantiate is related to the word substantial, which means "solid." So, to substantiate a claim is to make it solid or believable. If the evidence given in support of an argument is weak and unconvincing, that evidence can be described as insubstantial. Of course, in special cases like the Tooth Fairy, having substantial evidence doesn’t seem to matter; fans just keep on believing.
Vocabulary lists containing substantiate
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The SAT: Language of the Test, List 6
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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.
See Examples For:
Lillian Carranza said she understood why Flores “might feel compelled to gather evidence to substantiate serious allegations,” given how the department has handled past whistleblower cases.
From Los Angeles Times ● Aug. 7, 2026
Exhaustive reviews of the published science on raw milk have broadly been unable to substantiate claims of its benefits, and most experts agree that it is neither healthy nor safe to consume.
From Salon ● Jun. 22, 2026
Investigators ultimately said there was insufficient evidence to substantiate the allegations.
From BBC ● Jun. 9, 2026
Such errors have led to the faulty identification of “longevity zones,” areas where supposedly everyone lives longer due to lifestyle or location—but where subsequent studies fail to substantiate the claims.
From The Wall Street Journal ● Jun. 5, 2026
But there was an unmistakable grooming about him, too; he was not one of those who used untidiness to substantiate their radicalism.
From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie
And it substantiates the argument Sir Keir himself made in the House of Commons.
From BBC ● Feb. 11, 2026
Season 3’s Mind Flayer substantiates every hormonal nightmare in a single terror, series writer Kate Trefry told Entertainment Weekly in 2019.
From Salon ● Nov. 24, 2025
“Not every criminal investigation substantiates evidence of a criminal violation of federal law,” she said.
From Seattle Times ● May 16, 2023
It substantiates — it symphonizes — the I among the we.
From Los Angeles Times ● Sep. 16, 2021
Your sister substantiates this failing for as her letter progresses her judgment gives way to temper—her thoughts are good, lucid the products of intelligence, but it is not now an unbiased, impersonal intelligence.
From "In Cold Blood" by Truman Capote
"No court, no agency has ever substantiated any allegation of abuse against me," Miller said in a video posted Sunday, insisting he would remain in the race and win.
From Barron's ● Aug. 3, 2026
The anticipated decrease in heart disease was not substantiated, and, more alarmingly, they cited “excess harm.”
From MarketWatch ● May 12, 2026
The ASA does not comment on specific cases, but is taking steps against the advertisers flagged by the BBC which made claims that were "unlikely" to be substantiated.
From BBC ● May 7, 2026
This is an exceptionally delicate and even dangerous link to point out, even if fully substantiated.
From Los Angeles Times ● Mar. 24, 2026
Evidence Against Her or Suspicious Circumstances: Story of man in her compartment is substantiated by the evidence of Hardman and that of the woman Schmidt.
From "Murder on the Orient Express" by Agatha Christie
This watershed boxed set features cutting-edge remasters of the singer’s 1920s recordings, substantiating her centrality in blues and beyond.
From The Wall Street Journal ● Jul. 20, 2026
The New York Times has reviewed documentation substantiating her account.
From New York Times ● Mar. 16, 2024
The group put a lot of effort into substantiating RoboChem's results.
From Science Daily ● Jan. 25, 2024
They wrote that they found no substantiating evidence to warrant the imposition of terrorism charges.
From BBC ● Jan. 22, 2024
Of Fox some pretty anecdotes are told, substantiating that eminent man's character for courtesy.
From Blackwood's Edinburgh Magazine, Volume 61, No. 378, April, 1847 by Various
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
