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 After a similarly poor, though far less mendacious, performance from Biden in the Presidential debate, leaders in his party demanded that the President exit the race. Susan B. Glasser, The New Yorker, 8 Aug. 2024 Florida’s mendacious leaders only darken the nightmare. Jake Cline, Washington Post, 8 July 2024 The mendacious Gray Heron lures Mahito into a dreamlike world with the possibility of bringing back his deceased mother. Eric Vilas-Boas, Vulture, 10 Mar. 2024 This is a crabbed and mendacious interpretation of the law. Michael Hiltzik, Los Angeles Times, 5 Apr. 2024 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Perhaps Simpson’s most dishonest claim was that Social Security’s drafters deliberately set the retirement age at 65 because life expectancy in 1935, at the time of enactment, was 63.
    Michael Hiltzik, Los Angeles Times, 19 Mar. 2025
  • Higher-ups and colleagues see through the charade as dishonest.
    Bryan Robinson, Forbes, 2 Mar. 2025
Adjective
  • There were reports for a decade that his defection was imminent and even an erroneous report by a major outlet that a defection had happened.
    Kevin Acee, San Diego Union-Tribune, 23 Mar. 2025
  • Children’s Health Defense is an organization founded by Health and Human Services Secretary Robert F. Kennedy Jr., who has been criticized for his mixed and erroneous messaging about the ongoing measles outbreak, the largest in six years.
    Eduardo Cuevas, USA TODAY, 21 Mar. 2025
Adjective
  • President Donald Trump’s decision to withdraw the United States from the Paris climate agreement on June 1 was terribly misguided, and his justification for doing so was misleading and untruthful.
    Robert N. Stavins, Foreign Affairs, 5 June 2017
  • What is more untruthful: A thing written down, or a sustained deception of the heart?
    Nicolette Polek, Harper's Magazine, 2 July 2024
Adjective
  • Fowler played more of a false nine and dropped deeper to stitch the play together, combining well with Jill Roord.
    Charlotte Harpur, The Athletic, 20 Mar. 2025
  • The pivotal addition to the the state Civil Code reads: Existing law provides that libel is a false and unprivileged written publication that injures the reputation and that slander is a false and unprivileged publication, orally uttered, that injures the reputation, as specified.
    Dominic Patten, Deadline, 20 Mar. 2025

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 2 Apr. 2025.

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