What does “infallible” mean?
- 1
adjectivenever wrong or never making mistakes
Doctors are not infallible.
- 2
adjectivealways working or effective
There is no infallible method for picking stocks.
Infallible at a glance
- Part of speech
- adjective
- CEFR level
- C2 (proficient)
- Pronunciation
- /ɪnˈfæləbəl/ · in-FAL-uh-bul
How to use “infallible” correctly
Often used in the negative: “Nobody is infallible.” The opposite “fallible” means able to make mistakes.
Synonyms, opposites and related words
Synonyms (similar meaning)
- unerring
- foolproof
- reliable
Antonyms (opposite meaning)
- fallible
- unreliable
Word family
- infallibility
- fallible
“infallible” is on these word lists
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