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

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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 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 How democracy works Congress is not infallible, and the Constitution does not suggest that its judgment should automatically prevail over presidential will. — Stephanie A, The Conversation, 22 June 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
  • Demand planning capabilities on the Blue Yonder Platform utilize patented algorithms and advanced machine learning models to ensure that demand forecasting is not only highly accurate, but reliable.
    — Arthur Zaczkiewicz, Footwear News, 13 Aug. 2026
  • Later reports would place the bear’s weight as high as 600 pounds, but the most reliable estimates were less than 250.
    — Paul Schullery, Outdoor Life, 13 Aug. 2026
Definition of reliable
Adjective
  • Although umbrella insurance is far from perfect ― for instance, intentional acts are generally excluded ― umbrella insurance can provide much larger coverage amounts for things already covered by other policies with lower limits.
    — Jay Adkisson, Forbes.com, 11 Aug. 2026
  • Brionna Jones, returning from injury and still finding her footing, went a perfect 5-of-5 from the field for 15 points.
    — Christopher Harris, CBS News, 11 Aug. 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
  • Most glaring is the disparity between the top-tier clinical protocols and the logistics, which are more hapless than flawless.
    — Mark Ellwood, Robb Report, 8 Aug. 2026
  • Their skin is flawless, their cheeks rosy, their bodies unmarked by the forces of gravity or physical strain.
    — Carmen Rosenberg-Miller, Artforum, 6 Aug. 2026
Definition of flawless
Adjective
  • There’s ready-to-wear, sure, but also accessories that are easy to carry from one season to the next.
    — Andrea Zendejas, Vogue, 11 Aug. 2026
  • Everyone has a plan, sure, and sometimes an ironclad belief in their motivations for that plan, but something always twists itself into a messy little knot in the execution.
    — Brian Grubb, Vulture, 10 Aug. 2026
Definition of sure

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infallible
infallibly
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Cite this Entry

“Infallible.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infallible. Accessed 16 Aug. 2026.

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Nglish: Translation of infallible for Spanish Speakers

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