Definition of untruthfulnext

Synonym Chooser

How does the adjective untruthful differ from other similar words?

Some common synonyms of untruthful are deceitful, dishonest, and mendacious. While all these words mean "unworthy of trust or belief," untruthful stresses a discrepancy between what is said and fact or reality.

an untruthful account of their actions

When is deceitful a more appropriate choice than untruthful?

The words deceitful and untruthful 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 would dishonest be a good substitute for untruthful?

While the synonyms dishonest and untruthful are close in meaning, dishonest implies a willful perversion of truth in order to deceive, cheat, or defraud.

a swindle usually involves two dishonest people

When might mendacious be a better fit than untruthful?

While in some cases nearly identical to untruthful, 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

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 untruthful Federal authorities announced an investigation Friday of two immigration officers who appeared to have made untruthful statements under oath about a shooting in Minneapolis last month. Hannah Schoenbaum, Los Angeles Times, 14 Feb. 2026 Trump, of course, was rude, untruthful, and excessively, if not quite so egregiously, long-winded in his first term, too. Susan B. Glasser, New Yorker, 22 Jan. 2026 King suggested the defense attorney was being untruthful. Darcie Moran, Freep.com, 13 Nov. 2025 Officers making contact with Hyatt noted an odor of intoxicants, staggering gait, confusion and illogical, untruthful responses to questions, according to the motion. Arkansas Online, 18 Aug. 2025 See All Example Sentences for untruthful
Recent Examples of Synonyms for untruthful
Adjective
  • Although Rodman’s research shows that generative AI can help diagnose rare diseases or make sense of unusual symptoms, a randomized trial that was published in NEJM AI just the week before found that intentionally erroneous output from an AI model can easily lead doctors astray.
    Benjamin Mazer, The Atlantic, 17 June 2026
  • The good news is, though, that while an erroneous freeze can cause big trouble with your bills, it can usually be reversed.
    Angelica Leicht, CBS News, 15 June 2026
Adjective
  • Mountain views, fishing ponds, sauna The misleading name of the town aside, there’s nothing small about this property.
    Bailey Berg, Architectural Digest, 26 June 2026
  • The authors note apoB is particularly valuable for patients with high triglycerides, insulin resistance or lower LDL-C levels, where traditional cholesterol numbers can be misleading.
    Samantha Agate, Kansas City Star, 26 June 2026
Adjective
  • This commonly results from inaccurate color representation, poor fit or discrepancies between the physical item and its depiction on the website.
    Tal Lev-Ami, Forbes.com, 23 June 2026
  • Choi said McGee would use terminology that could have swayed a jury and sometimes provided an inaccurate window for a time of death.
    Aki Nace, CBS News, 23 June 2026
Adjective
  • An honest summary would still pass the buck to the voters on a grossly dishonest scheme, but at least the voters might recognize a description that doesn’t cajole, coax and mislead them.
    Sun Sentinel Editorial Board, Sun Sentinel, 20 June 2026
  • What is obvious is that the only thing as dishonest as FIFA’s insistence that the breaks are only because of its concerns about players’ health is FIFA’s claiming that the stoppages don’t impact matches.
    Scott M. Reid, Oc Register, 19 June 2026
Adjective
  • Govern From Day One In a regulated context, an assistant that produces a confident but incorrect answer carries genuine regulatory and reputational exposure.
    Ricardo Tavares, Forbes.com, 23 June 2026
  • Many argue that signatures are invalid because signers listed incorrect addresses or live outside of the district the candidate wants to represent.
    Kate Armanini, Chicago Tribune, 20 June 2026
Adjective
  • The 2026 State of the Union speech stands in contrast, a speech by a mendacious demagogue who has degraded his listeners by debauching their instincts.
    Eliot A. Cohen, The Atlantic, 26 Feb. 2026
  • 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
Adjective
  • Something told me that there was something wrong.
    Max Saltman, CNN Money, 28 June 2026
  • The interest rate hypothesis points the wrong direction — the most rate-sensitive occupations, like construction, have the lowest AI exposure.
    Nick Lichtenberg, Fortune, 27 June 2026
Adjective
  • Nadi Jabari, 46, was charged with false personation, unlawful use of a blue light and possession of a firearm during the commission of a felony, the Hillsborough County Sheriff's Office said in a news release.
    Liam Quinn, PEOPLE, 26 June 2026
  • Back when King was indicted in the summer of 2025, about 200 of them gathered in a Cleburne conference hall to make plans about how to support the sheriff, and decried the allegations against him as false attacks on King’s character.
    Lillie Davidson, Fort Worth Star-Telegram, 26 June 2026

Browse Nearby Words

Cite this Entry

“Untruthful.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/untruthful. Accessed 1 Jul. 2026.

More from Merriam-Webster on untruthful

Love words? Need even more definitions?

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

More from Merriam-Webster