adjective
infallible
ihn-FA-lih-buhl
adjective
1
Never wrong; incapable of making a mistake.
"No system is truly infallible, however well it's tested."
"She used to think her mother's judgement was infallible."
2
Certain to work every time.
"He swore by an infallible method for winning at cards."
How to Use Infallible
Learner’s notesIn plain EnglishSomething (or someone) that never gets it wrong.
Easily confused with
fallible
Common pairings
infallible judgement
far from infallible
infallible method
Word Forms
more infallible comparative, infallibles plural, most infallible superlative
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No system is truly _____, however well it's tested.
Etymology
From Medieval Latin infallibilis, from Latin in- ("not") + fallibilis ("liable to fail").