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 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 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 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 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 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Harvard’s dishonest expert on honesty is a poignant symbol of a far larger problem in academia: ideological allegiance replacing the quest for truth.
    Andrew Follett, National Review, 31 May 2025
  • On one hand, the inquiry appeared to play into his rivals’ criticisms of Mr. Cuomo as a dishonest broker, who has been accused of putting nursing home residents at risk during the coronavirus pandemic and seeking to cover it up.
    Nicholas Fandos, New York Times, 21 May 2025
Adjective
  • Those have included other deportations to third countries and the erroneous deportation of Kilmar Abrego Garcia, an El Salvadoran who had lived in Maryland for roughly 14 years working and raising a family.
    Julie Carr Smyth, Chicago Tribune, 24 May 2025
  • Those have included other deportations to third countries and the erroneous deportation of Kilmar Abrego Garcia, a Salvadoran who had lived as a legal U.S. resident in Maryland for 14 years while working and raising a family.
    Julie Carr Smyth, Los Angeles Times, 24 May 2025
Adjective
  • The document discovery in those cases revealed that France had been untruthful during the NFLPA arbitration process.
    Chris Deubert, Forbes.com, 17 May 2025
  • During the trial, prosecutors showed videos of the multiple interviews Troconis had with law enforcement and accused her of being untruthful about Farber Dulos’ disappearance.
    Justin Muszynski, Hartford Courant, 21 Apr. 2025
Adjective
  • The decision to deploy Dembele as a false nine for a 3-1 home win over Lyon in mid-December proved the spark for a stupendous run of goal-scoring form in which the France international racked up 27 goals in only 22 appearances.
    Tom Williams, New York Times, 30 May 2025
  • Their accountant filed two false corporate tax returns, claiming one of the couple’s firms earned no money in 2015 and 2016.
    Howard Gleckman, Forbes.com, 30 May 2025

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 4 Jun. 2025.

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