infallible

adjective

(ˌ)in-ˈfa-lə-bəl How to pronounce infallible (audio)
Definition of infalliblenext
1
as in unerring
not being or likely to be wrong a teacher with an infallible memory for names

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Antonyms & Near Antonyms
2
as in reliable
not likely to fail an infallible cure for hiccups

Synonyms & Similar Words

Antonyms & Near Antonyms

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 infallible These words are also coming from a former priest, a man the world is taught to believe is infallible simply because of his profession. — Whitney Friedlander, Variety, 6 Aug. 2026 Bash, Tapper, CNN and many others treated Fauci as an infallible god. — Ian Miller Outkick, FOXNews.com, 3 Aug. 2026 Not that the Coastal Commission has been infallible over the years. — Steve Lopez, Los Angeles Times, 11 July 2026 Both experts acknowledged that the tests are not infallible, can’t determine exactly when DNA was left on an item, and can't confirm the source of DNA with absolute certainty. — N'dea Yancey-Bragg, USA Today, 10 July 2026 See All Example Sentences for infallible
Recent Examples of Synonyms for infallible
  1. unerring
  2. reliable
  3. perfect
  4. unfailing
  5. flawless
  6. sure
Adjective
  • My admiration extends to the unerring precision of their filmmaking.
    — Justin Chang, NPR, 2 Oct. 2026
  • Voiced by Tom Kenny, SpongeBob’s unerring positivity and childlike glee immediately captured our hearts and minds, so much so that the show has continued for more than 25 years.
    — Declan Gallagher, Entertainment Weekly, 10 Sep. 2026
Definition of unerring
Adjective
  • Democrats have circled Alaska, a typically reliable Republican state, as a winnable seat in their bid to flip the Senate in the 2026 midterm elections.
    — Christian Datoc, The Washington Examiner, 14 Oct. 2026
  • Both problems threatened the precise control required for reliable quantum experiments.
    — Aamir Khollam, Interesting Engineering, 13 Oct. 2026
Definition of reliable
Adjective
  • The Perfect Prescription is Spacemen 3’s masterpiece, an imperfect record made by one of the last holistically perfect groups of the 20th century.
    — Gabriel Szatan, Pitchfork, 18 Oct. 2026
  • The home office that completes this level offers a perfect spot for working from home.
    — James Alexander, Hartford Courant, 18 Oct. 2026
Definition of perfect
Adjective
  • Everything is infused with melancholy, the unfailing indicator of the fundamental rift between humans and their natural environment.
    — Literary Hub, Literary Hub, 11 Aug. 2026
  • Their reach was owed not just to the nine-member unit’s technical excellence and versatility but also their endless supply of positivity, of psychedelic Black power characterized by its leader’s unfailing belief in a beautiful tomorrow.
    — Craig Jenkins, Vulture, 9 June 2026
Definition of unfailing
Adjective
  • For this application, precise fit and utility matter more than a flawless cosmetic finish.
    — Michael Lydick, PC Magazine, 14 Oct. 2026
  • Our goal is to perfectly complement Paramount Pictures’ cinematic vision and Caruso’s beautiful retail destination by delivering a flawless, high-end guest experience.
    — Brian Welk, IndieWire, 13 Oct. 2026
Definition of flawless
Adjective
  • Tim Boyd San Juan Capistrano I’m sure there are Dodgers fans unhappy about losing to the Brewers.
    — Los Angeles Times, Los Angeles Times, 17 Oct. 2026
  • Lying to Grace bought Kate some time, sure, but the cost is vertiginously steep.
    — Sophie Brookover, Vulture, 17 Oct. 2026
Definition of sure

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infallibility
infallible
infallibly
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Cite this Entry

“Infallible.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infallible. Accessed 20 Oct. 2026.

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