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 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 The administration of President Joe Biden has been steadfast in its refusal to criticize López Obrador’s security policies, avoiding confrontation even when the Mexican president has publicly attacked U.S. law-enforcement agencies as mendacious and corrupt. Tim Golden, ProPublica, 31 Jan. 2024 See All Example Sentences for mendacious
Recent Examples of Synonyms for mendacious
Adjective
  • Truth oaths are not just for the U.S. Internal Revenue Service but for many different companies that want to curb dishonest behavior or that ask employees to report information that is difficult to verify.
    IESE Business School, Forbes, 7 Mar. 2025
  • Greta’s stealth revolution may look natural, but the change is weak and dishonest.
    Armond White, National Review, 5 Mar. 2025
Adjective
  • According to the Financial Times, the erroneous internal transfer occurred in April 2024 and was missed by a payments employee and a second official assigned to check the transaction before it was cleared to be processed at the start of business the next day.
    Erin Clack, People.com, 1 Mar. 2025
  • Our inquiry to the hospital was due to an erroneous order of a separate inpatient stay request.
    Kara Nesvig, Allure, 27 Feb. 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
  • To illustrate, in the United Kingdom vaccinations took a considerable dip in the early 2000s after Wakefield’ false claims of a link between the MMR shot and autism were posted in the media.
    Joshua P. Cohen, Forbes, 8 Mar. 2025
  • In those documents, West discussed not only how to conduct experiments to implant false memories, instill specific mental disorders, and induce trance states, but also how to hide them.
    Randall Colburn, EW.com, 8 Mar. 2025

Browse Nearby Words

Podcast

Cite this Entry

“Mendacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/mendacious. Accessed 13 Mar. 2025.

More from Merriam-Webster on mendacious

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!