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
  • Solidaridad notes that data can be misleading.
    Angela Velasquez, Sourcing Journal, 23 Sep. 2025
  • The President has also made a number of false or misleading statements regarding renewable energy while pushing to expand the production of fossil fuels, the use of which has been identified as the main source of humans’ greenhouse gas emissions.
    Chantelle Lee, Time, 23 Sep. 2025
Adjective
  • 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
  • These are cheap, dishonest shots against a great intellect, acknowledged by friends and opponents alike.
    James Gaylord, Oc Register, 15 Sep. 2025
Adjective
  • And in 2010’s Flash Crash, algorithmic trading bots created a feedback loop of erroneous trades, wiping out nearly $1 trillion in market value in minutes.
    Steve Booren, Denver Post, 21 Sep. 2025
  • Who is responsible if an agent makes erroneous buying decisions or incorrectly files a legal document?
    Bernard Marr, Forbes.com, 17 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
  • Bondi’s appearance on Fox News comes days after Comey was indicted by a federal grand jury on two of three counts sought by prosecutors, one count of making false statements and one count of obstruction of justice, according to documents.
    Sydney Topf, The Washington Examiner, 27 Sep. 2025
  • Criminal court records reviewed by PEOPLE show the 35-year-old faces charges of public intoxication, disorderly conduct, resisting arrest and a false report.
    Colson Thayer, PEOPLE, 27 Sep. 2025

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 30 Sep. 2025.

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