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.
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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
100 Top "SAT" Words
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The SAT: Language of the Test, List 6
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The New SAT: Words to Capture Tone
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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
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
She said firms should do proper skin analysis over a period of time to substantiate any claims made by volunteer groups or in advertising.
From BBC ● Apr. 28, 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
The committee can take a wide range of actions if it substantiates the allegations in an investigation, including recommending that a member be reprimanded, censured or removed, or referring the conduct to the U.S.
From Los Angeles Times ● Aug. 17, 2026
And it substantiates the argument Sir Keir himself made in the House of Commons.
From BBC ● Feb. 11, 2026
“Not every criminal investigation substantiates evidence of a criminal violation of federal law,” she said.
From Seattle Times ● May 16, 2023
“We have put forward compelling and unrebutted factual evidence that substantiates his status,” attorney David Rivkin said.
From Washington Times ● Dec. 23, 2022
“Apparently, it’s public record, and it substantiates what you described. He told me that we should look at it”—Gay paused meaningfully—“before too long.”
From "Three Little Words: A Memoir" by Ashley Rhodes-Courter
In both cases, Cornell held internal investigations through Title IX proceedings that substantiated the claims.
From The Wall Street Journal ● Oct. 2, 2026
“My testimony and the testimony of the other women were substantiated by investigators,” she said.
From Los Angeles Times ● Sep. 12, 2026
If a claim is substantiated, the plagiarist is seen as sloppy or lazy at best, and fundamentally dishonest at worst.
From Salon ● Aug. 23, 2026
"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
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 Turkish government said it “fully respects international law”, adding that the UN’s February 2024 report provided “no substantiating evidence” for its “unfounded allegations”.
From BBC ● Nov. 19, 2024
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
When confronted with the facts substantiating such charges the author answers the argument by exclaiming: 'But how absurd!
From The Railroad Question A historical and practical treatise on railroads, and remedies for their abuses by William Larrabee
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.
