infallible

Meanings

Noun

• A person who, or an object or process that, is taken as being infallible.

Adjective

• Without fault or weakness; incapable of error or fallacy.
• Certain to produce the intended effect, sure.

Related

Similar words

• faultless
• perfect
• indefective

Opposite words

• fallible
• defective
• faultful
• faulty
• imperfect
• error-prone

Origin

• From Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible.