Definition of mendaciousnext

Synonym Chooser

How does the adjective mendacious differ from other similar words?

Some common synonyms of mendacious are deceitful, dishonest, and untruthful. While all these words mean "unworthy of trust or belief," mendacious may suggest bland or even harmlessly mischievous deceit and when used of people often suggests a habit of telling untruths.

mendacious tales of adventure

When is deceitful a more appropriate choice than mendacious?

The words deceitful and mendacious are synonyms, but do differ in nuance. Specifically, deceitful usually implies an intent to mislead and commonly suggests a false appearance or double-dealing.

the secret affairs of a deceitful spouse

When might dishonest be a better fit than mendacious?

In some situations, the words dishonest and mendacious are roughly equivalent. However, dishonest implies a willful perversion of truth in order to deceive, cheat, or defraud.

a swindle usually involves two dishonest people

In what contexts can untruthful take the place of mendacious?

The meanings of untruthful and mendacious largely overlap; however, untruthful stresses a discrepancy between what is said and fact or reality.

an untruthful account of their actions

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of mendacious President Trump is mendacious, vengeful, and unscrupulous. Krista Kafer, Denver Post, 20 Oct. 2025 But future generations in China, those not bound by the same baggage as the Xi family, may someday find their voice and want to overturn Mao’s old mendacious order. Foreign Affairs, 20 Oct. 2025 At Comedy Central, Colbert rose to prominence playing a slightly exaggerated version of Bill O’Reilly and other unapologetically mendacious Fox News pundits from the George W. Bush years. Alan Sepinwall, Rolling Stone, 18 July 2025 The true story reveals both how freedom of speech first came to be conceived of as a mechanism for truth, an antidote to falsehood, and the foundation of all liberty—and that, ironically, this new and powerful theory was itself a deliberately mendacious fiction. Fara Dabhoiwala, Harpers Magazine, 4 June 2025 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • But without context, that figure is deeply misleading.
    Robert Pearl, Twin Cities, 8 Mar. 2026
  • Staff member Brandon Richards, who made $136,000 last year, is tasked with quickly dispatching responses to information the governor’s team deems inaccurate or misleading that is spread on social media and in the media.
    Taryn Luna, Los Angeles Times, 6 Mar. 2026
Adjective
  • More and more people are avoiding dating or befriending those with opposing political views, and growing numbers describe those on the other side as closed-minded, dishonest, immoral and unintelligent.
    Justin Callais, Chicago Tribune, 2 Mar. 2026
  • His judgments about the characters—both famous and obscure—who mattered in this low, dishonest era are always persuasive.
    Gabrielle Bellot, Literary Hub, 27 Feb. 2026
Adjective
  • This story has been updated to correct erroneous information originally released by the city of Radcliff.
    Leo Bertucci, Louisville Courier Journal, 3 Mar. 2026
  • This was due to erroneous data provided by Dallas County, the Texas Secretary of State’s office told Hearst Newspapers.
    Bayliss Wagner, Austin American Statesman, 3 Mar. 2026
Adjective
  • Federal authorities announced an investigation Friday of two immigration officers who appeared to have made untruthful statements under oath about a shooting in Minneapolis last month.
    Hannah Schoenbaum, Los Angeles Times, 14 Feb. 2026
  • Trump, of course, was rude, untruthful, and excessively, if not quite so egregiously, long-winded in his first term, too.
    Susan B. Glasser, New Yorker, 22 Jan. 2026
Adjective
  • He was found dead lying face up on his hotel bed with no signs of trauma, according to a Monday report from the Orange County Sheriff’s Office in Florida.
    Kenan Draughorne, Los Angeles Times, 14 Jan. 2022
Adjective
  • Richards and the governor’s office pushed back on false assertions that Newsom and his wife, First Partner Jennifer Siebel Newsom, were stealing money from the state through her office that same day.
    Taryn Luna, Los Angeles Times, 6 Mar. 2026
  • Air power cannot overthrow a government, some say, which is on one level true—a fighter jet cannot take the keys to the presidential palace, after all—and on another level, obviously false.
    Eliot A. Cohen, The Atlantic, 6 Mar. 2026

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 11 Mar. 2026.

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