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 Supporters of recent state AI regulations said the measures will address potential threats to public safety and personal privacy, and to counter any mendacious actions created by AI, while not hindering innovation. Hope Moses, Chicago Tribune, 10 Jan. 2026 In the dry California hills, an intentional community tries to build a pyre for one of its own, and, in the complex and mendacious aftermath, may end up sort of burning down the nation-state. Helen Shaw, New Yorker, 14 Dec. 2025 To claim the opposite rings hollow at best, if not mendacious. Literary Hub, 10 Dec. 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 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Democrats on the House Natural Resources Committee released a report this week criticizing the president and Freedom 250, accusing it of diverting funds and misleading sponsors.
    Luke Fountain, CNBC, 3 July 2026
  • The charge alleges a person knowingly defrauded another by using false or misleading information to obtain money, property, credit or a loan.
    Darrell Smith, Sacbee.com, 2 July 2026
Adjective
  • For millions of individuals and businesses who rely on professional preparers, the answer portends a frightening prospect if the return preparer is dishonest.
    Virginia La Torre Jeker, Forbes.com, 30 June 2026
  • Her attorneys contend the defendants used the litigation to portray her as dishonest, intimidate potential witnesses, fuel a public relations campaign against her and drive up the cost of her legal defense.
    Adam Reiss, NBC news, 30 June 2026
Adjective
  • In addition, the trial judge gave the jury erroneous instructions, the appeals court ruled.
    David Hilzenrath, USA Today, 2 July 2026
  • But such fine evidence of the erroneous human touch in the publishing process is, of course, cherished by collectors of this day.
    Guy Martin, Forbes.com, 30 June 2026
Adjective
  • This inquiry identified insufficient evidence to conclude that Garcia knowingly made an untruthful statement.
    Brian Maass, CBS News, 19 June 2026
  • Since 2019, state law has required law enforcement agencies that employ POST certificate holders to notify the board if a certificate holder knowingly made an untruthful statement during an internal affairs investigation, among other circumstances.
    Shelly Bradbury, Denver Post, 8 May 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
  • The charge alleges a person knowingly defrauded another by using false or misleading information to obtain money, property, credit or a loan.
    Darrell Smith, Sacbee.com, 1 July 2026
  • Opponents of Amendment 5 have flatly called the advertisement misleading or false.
    Kacen Bayless, Kansas City Star, 1 July 2026

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 5 Jul. 2026.

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