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
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of infallible
Similar to human drivers, Zoox's AI and safety systems aren't infallible, but the test ride vehicle didn't exhibit any odd behaviors that seemed problematic or scary for occupants.
—
Charles Singh,
USA Today,
11 May 2026
The presumption that my doctor was infallible.
—
Nick Lichtenberg,
Fortune,
3 May 2026
The drones are not infallible because the wind — or other drones — can cause the cables to tangle.
—
ABC News,
30 Apr. 2026
Not a great job, mind you, and certainly not an infallible one.
—
Sean McIndoe,
New York Times,
24 Apr. 2026
See All Example Sentences for infallible
Charles Singh,
USA Today,
11 May 2026
The presumption that my doctor was infallible.
—
Nick Lichtenberg,
Fortune,
3 May 2026
The drones are not infallible because the wind — or other drones — can cause the cables to tangle.
—
ABC News,
30 Apr. 2026
Not a great job, mind you, and certainly not an infallible one.
—
Sean McIndoe,
New York Times,
24 Apr. 2026
See All Example Sentences for infallible
Recent Examples of Synonyms for infallible
Adjective
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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.
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Ditto Hugh Jackman’s unerring performance — perhaps his finest dramatic work yet — as a savage, unfeeling thug and unrepentant murderer and thief.
Adjective
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Andrews, a lifelong resident of Red Hook Houses West, said the community has waited long enough for a reliable pool.
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No reliable figures are available for battlefield casualties in the war.
Adjective
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Mexico enters a must-win World Cup knockout against Ecuador at Azteca after a perfect group stage, three clean sheets and record-shattering crowds.
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Diop found separation behind all-world defender Virgil van Dijk and headed Chemsdine Talbi's perfect cross into the goal.
Adjective
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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.
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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.
Adjective
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Because autonomous agents execute end-to-end business logic, deployment requires a flawless blend of operational domain expertise (business) and systemic oversight (IT).
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The fluffy brush made with vegan bristles is angled for flawless foundation application.
Adjective
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Cruz, who also gave up an RBI single to Anthony Seigler and a game-tying sac fly to Tsung-Che Cheng, made sure to take responsibility for his part in the loss.
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Update your emergency kit and be sure to include enough food and water to last for 3 days for each person in your home.
Cite this Entry
“Infallible.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infallible. Accessed 7 Jul. 2026.
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