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 Trump’s contrived veneer is being ripped away to reveal an immoral, mendacious, transactional opportunist, without a shred of loyalty to anyone or anything but himself. Sun Sentinel Editorial Board, Sun Sentinel, 21 Mar. 2025 Her unsettling command of the character — who was equal parts sweet, vulnerable, mendacious, and menacing — was one of the highlights of the series. Jake Kanter, Deadline, 24 Dec. 2024 The candidate vying for a second White House stint — in the midst of his third overall campaign — has accumulated a long list of acts who do not want to be associated with his divisive, frequently mendacious rhetoric. Gil Kaufman, Billboard, 15 Oct. 2024 Two stand out: his profile and endorsement, in 2000, of Ralph Nader’s independent presidential campaign, and his early opposition to George W. Bush’s disastrous and mendacious invasion of Iraq. Yiyun Li, Harper's Magazine, 23 Sep. 2024 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Despite these accounts, Day offered a very different picture in an opinion piece published by The Oregonian on Sunday, arguing that national media coverage of Portland and its police paint a misleading and outdated picture.
    Greg Wehner, FOXNews.com, 6 Oct. 2025
  • The apparent protective effect of dopamine agonist drugs could also be misleading.
    Maria Morava, MSNBC Newsweek, 6 Oct. 2025
Adjective
  • Ventura also rejected the defense’s portrayal of Combs as a changed man, calling it dishonest and dangerous.
    Hannah Parry, MSNBC Newsweek, 3 Oct. 2025
  • No wonder de Lesseps became a national pariah whose name was synonymous with dishonest incompetence.
    U T Editorial Board, San Diego Union-Tribune, 19 Sep. 2025
Adjective
  • Engineers outfitted the device with a heater to melt ice in the winter, a customization that should improve accuracy during Arizona’s freeze-thaw cycles that have long created erroneous measurements.
    Hayleigh Evans, AZCentral.com, 2 Oct. 2025
  • Vedra and other debt law experts said a high rate of default judgments indicates a system that favors the pursuers over the pursued — and increases the chances someone will be harmed by an erroneous bill.
    Rae Ellen Bichell, Fortune, 29 Sep. 2025
Adjective
  • Officers making contact with Hyatt noted an odor of intoxicants, staggering gait, confusion and illogical, untruthful responses to questions, according to the motion.
    Arkansas Online, Arkansas Online, 18 Aug. 2025
  • The deficient vice of integrity is being fake, untruthful, inconsistent, unprincipled, and manipulative.
    Mary Crossan, Forbes.com, 17 July 2025
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
  • In his plea agreement, Jones admitted using his company to submit more than $2 million in false bills to the Foundation for audiovisual services.
    Michelle Marchante, Miami Herald, 12 Oct. 2025
  • If convicted of bank fraud or making false statements, the penalties could include up to 30 years in prison and $1 million in fines for each count, the DOJ says.
    Deputy News Editor, MSNBC Newsweek, 11 Oct. 2025

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 14 Oct. 2025.

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