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 President Trump is mendacious, vengeful, and unscrupulous. Krista Kafer, Denver Post, 20 Oct. 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 At Comedy Central, Colbert rose to prominence playing a slightly exaggerated version of Bill O’Reilly and other unapologetically mendacious Fox News pundits from the George W. Bush years. Alan Sepinwall, Rolling Stone, 18 July 2025 The true story reveals both how freedom of speech first came to be conceived of as a mechanism for truth, an antidote to falsehood, and the foundation of all liberty—and that, ironically, this new and powerful theory was itself a deliberately mendacious fiction. Fara Dabhoiwala, Harpers Magazine, 4 June 2025 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Martin suggested that other Republicans are circulating equally misleading mailers, but that the party is targeting DeMaio.
    Andrew Graham May 15, Sacbee.com, 16 May 2026
  • The show has already done these misleading posters, including one where Homelander floats in space, watching nukes go off on Earth below.
    Paul Tassi, Forbes.com, 16 May 2026
Adjective
  • The business world will likely never be without people who are dishonest and lack integrity, but ethics and moral integrity are still important.
    Megan Poinski, Forbes.com, 18 May 2026
  • The election took place amid a surge in violent crime and corruption that has fueled widespread discontent among voters, who largely view candidates as dishonest and unprepared for the presidency.
    Arkansas Online, Arkansas Online, 16 May 2026
Adjective
  • Some free-speech experts at the time felt Disney had a chance to win that case, which revolved around erroneous statements made by ABC News anchor George Stephanopoulos.
    Meg James, Los Angeles Times, 11 May 2026
  • Spoofing relies on transmitting false signals that mimic authentic satellite signals to trick signal receivers into calculating erroneous positions for aircraft and other users.
    Andrew Cunningham, ArsTechnica, 11 May 2026
Adjective
  • 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
  • These questions were raised after reporting by The New York Times in August 2024 regarding Moore’s untruthful claims about receiving the Bronze Star in Afghanistan — a story originally reported on in 2022 by FOX45’s Mikenzie Frost.
    Baltimore Sun staff, Baltimore Sun, 26 Apr. 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
  • On May 14, Dana Williamson, a former top aide to Newsom and onetime Becerra political adviser, pleaded guilty in federal court after accepting a plea deal to multiple charges, including committing bank and wire fraud, filing a false tax return, and lying to the FBI.
    James Ward, USA Today, 15 May 2026
  • Dana Williamson, former top aide to Newsom, pleaded guilty in an FBI corruption probe to bank fraud, filing a false tax return and lying to the FBI.
    Sacbee.com, Sacbee.com, 15 May 2026

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Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 21 May. 2026.

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