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 Look For What's Missing From The Data Strong marketing leaders know data is directional, not infallible. — Expert Panel®, Forbes.com, 23 June 2026 Instead, he was treated as an infallible saint. — Ian Miller Outkick, FOXNews.com, 22 June 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 The hard part is building systems that make those signals legible to the people who have to act on them — who have to order more stock, shift production, or reposition inventory based on what the model says, knowing that the model is not infallible and that the cost of being wrong is real. — Karen Koehler, Charlotte Observer, 17 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
  • 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
  • The presence of another Golden Boot contender, the unerring Erling Haaland, means Norway is favored to progress against the Ivory Coast, although this is its first knockout match in 28 years.
    — David Hickey, NBC news, 30 June 2026
Definition of unerring
Adjective
  • As governments and technology companies search for reliable, low-carbon power solutions, micro-modular reactors are emerging as one of several technologies being explored to support future electricity demand.
    — Prabhat Ranjan Mishra, Interesting Engineering, 16 July 2026
  • Industrial and real estate investment plunged in the first half of the year, indicating that such longtime pillars of the Chinese economy are becoming less reliable in offsetting slow consumption.
    — Stephanie Yang, CNN Money, 15 July 2026
Definition of reliable
Adjective
  • From there, the acceleration and timing of his run are perfect to meet Saka’s clipped cross at the back post.
    — Thom Harris, New York Times, 13 July 2026
  • The pool is also fit with a complete outdoor kitchen and pavilion, perfect for a barbecue.
    — Fort Worth Star-Telegram, Fort Worth Star-Telegram, 13 July 2026
Definition of perfect
Adjective
  • 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
  • His unfailing commitment to civilian authority gave time for government institutions to sink roots, and established norms that gelled into the professional ethos of our military today.
    — Kori Schake, The Atlantic, 22 Mar. 2026
Definition of unfailing
Adjective
  • Thickening mist, root volumizer, dry shampoo, and texturizing spray all pair seamlessly with the brand's iconic root touchup products for the ultimate hack in keeping your hair looking thick, full and flawless between salon visits.
    — ABC News, ABC News, 14 July 2026
  • An easy summer staple, broderie anglaise (also known as eyelet lace) makes a flawless transition to fall when styled top-to-bottom, pairing airy lace blouses with equally sweet shorts, skirts, or trousers.
    — Rosie Jarman, Vogue, 10 July 2026
Definition of flawless
Adjective
  • Twenty-four-year-old Annagrace wasn't sure about her future after her time in foster care ended.
    — Leondra Head, CBS News, 13 July 2026
  • The only way to be completely sure of a rhabdo diagnosis is by getting tested by a healthcare provider, according to the CDC.
    — Hali Smith July 13, Idaho Statesman, 13 July 2026
Definition of sure

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Cite this Entry

“Infallible.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infallible. Accessed 19 Jul. 2026.

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Nglish: Translation of infallible for Spanish Speakers

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