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

Synonyms & Similar Words

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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 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 The government’s data are far from infallible (and, as history has shown, can be manipulated). — Will Gottsegen, The Atlantic, 9 July 2026 Corporate governance solutions rarely come in the form of universal, infallible prescriptions. — Jeffrey Sonnenfeld, Fortune, 6 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
  • Dean has an unerring sense about how to let her voice glide to the cumulus layer and back again, without remotely ever going over the top.
    — Chris Willman, Variety, 17 July 2026
  • While there is undeniable star power, and an unerring ability to get the job done, England will have opportunities to make a mark of their own.
    — Stuart James, New York Times, 12 July 2026
Definition of unerring
Adjective
  • The benefit of that consolidation has been reliable supply, standardized products and potentially lower labor costs, said Zagor.
    — Brandon Gomez, CNBC, 28 Aug. 2026
  • Launch virtual cardiology rounds and post-discharge follow-up at rural hospitals without reliable on-site cardiology access, with capacity for expansion beyond the pilot.
    — Arkansas Democrat-Gazette, Arkansas Online, 27 Aug. 2026
Definition of reliable
Adjective
  • Wrigley Field is a perfect setting for a rom-com, since many young fans are looking for romance and not paying a whole lot of attention to the actual game.
    — Paul Sullivan, Chicago Tribune, 1 Sep. 2026
  • Travis This name is perfect for fans of the Super Bowl-winning tight end of the Kansas City Chiefs, Travis Kelce (or his famous girlfriend, Taylor Swift).
    — Beth Ann Mayer, Parents, 1 Sep. 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
  • Conceiving it is one thing, pulling it off another entirely, and here Ballard’s technique and execution were flawless.
    — Conor O'Neill, New York Times, 23 Aug. 2026
  • Following a 64-minute weather delay, Sanders was flawless on Cleveland's first drive, capping by connecting with wide receiver Luke Floriea for an 8-yard TD.
    — ABC News, ABC News, 22 Aug. 2026
Definition of flawless
Adjective
  • Other people aren’t always so sure who John Malkovich is either.
    — Los Angeles Times, Los Angeles Times, 31 Aug. 2026
  • Shopping a single designer’s collection is also a sure-fire way to have a cohesive nursery that isn’t too matchy-matchy.
    — Julia Harrison, Architectural Digest, 31 Aug. 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 2 Sep. 2026.

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