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
  • Winds high above Saturn were generating electrical currents, creating a misleading auroral signal that mimicked changes in rotation.
    Rupendra Brahambhatt, Interesting Engineering, 28 Mar. 2026
  • Parts of the ballot language backing a tax on second homes in San Diego are misleading and must be amended, a judge ruled Thursday.
    Roxana Popescu, San Diego Union-Tribune, 27 Mar. 2026
Adjective
  • Asked about those allegations, Grossi said his role is to provide technical expertise, not to weigh in on whether Iran was honest or dishonest.
    Joe Walsh, CBS News, 20 Mar. 2026
  • This is dishonest and partisan.
    Letters to the Editor, The Orlando Sentinel, 13 Mar. 2026
Adjective
  • The stalemate stems from Democrats’ insistence on immigration-enforcement reform — particularly, the cruel and often erroneous enforcement that is sending shockwaves of fear throughout immigrant populations and even distressing American-citizen residents of Puerto Rico.
    Orlando Sentinel Editorial Board, The Orlando Sentinel, 21 Mar. 2026
  • Dodgers infielder Miguel Rojas addressed an erroneous report from earlier in the week with understanding while also making his feelings clear.
    Maddie Lee, Los Angeles Times, 18 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
  • Lebohang Morake — the Grammy-winning South African composer behind the film’s opening Zulu vocals — filed a federal civil complaint in California on March 16 against the comedian, Learnmore Jonasi, alleging that the translation is false and damaging to his life’s work.
    Joe Kottke, NBC news, 27 Mar. 2026
  • Rebollo, a 58-year-old Chula Vista resident, pleaded guilty in December in San Diego federal court to one count of wire fraud conspiracy, one count of filing a false tax return and one count related to Social Security fraud.
    Alex Riggins, San Diego Union-Tribune, 27 Mar. 2026

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 31 Mar. 2026.

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