infallible.
A person who, or an object or process that, is taken as being infallible.
Meaning & usage
A person who, or an object or process that, is taken as being infallible.
Where this word comes from
From Medieval Latin īnfallibilis, from Latin in- + fallibilis. Compare French infaillible. By surface analysis, in- + fallible.
Without fault or weakness; incapable of error or fallacy.
He knows about many things, but even he is not infallible.
Certain to produce the intended effect; sure.
Try this infallible cure for hiccups.
Certain to result from a specific cause; inevitable.
Where this word comes from
From Medieval Latin īnfallibilis, from Latin in- + fallibilis. Compare French infaillible. By surface analysis, in- + fallible.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.