INFALLIBLE

infallible

(adjective) incapable of failure or error; “an infallible antidote”; “an infallible memory”; “the Catholic Church considers the Pope infallible”; “no doctor is infallible”

Source: WordNet® 3.1

Etymology

Adjective

infallible (comparative more infallible, superlative most infallible)

Without fault or weakness; incapable of error or fallacy.

Certain to produce the intended effect, sure.

Synonyms

• faultless

• perfect

• indefective

Antonyms

• fallible

• defective

• faultful

• faulty

• imperfect

• error-prone

Source: Wiktionary

In*fal"li*ble, a. Etym: [Pref. in- not + fallible: cf. F. infallible.]

1. Not fallible; not capable of erring; entirely exempt from liability to mistake; unerring; inerrable. Dryden.

2. Not liable to fail, deceive, or disappoint; indubitable; sure; certain; as, infallible evidence; infallible success; an infallible remedy. To whom also he showed himself alive, after his passion, by many infallible proofs. Acts i. 3.

3. (R. C. Ch.)

Definition: Incapable of error in defining doctrines touching faith or morals. See Papal infallibility, under Infallibility.

Source: Webster’s Unabridged Dictionary 1913 Edition