Entry Word: infallible

Function: adjective

Meaning: 1 not being or likely to be wrong <a teacher with an infallible memory for names>

Synonyms unerring, unfailing

Related Words errorless, faultless, flawless, impeccable; certain, foolproof, perfect, sure; dependable, reliable

Near Antonyms defective, faulty, flawed, imperfect; undependable, unreliable

Antonyms fallible

2 not likely to fail <an infallible cure for hiccups>

Synonyms certain, sure, unfailing

Related Words dependable, reliable, surefire; deadly, unerring

Near Antonyms doubtful, questionable, uncertain

Antonyms fallible