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Adjective: infallible  in'fa-lu-bul
  1. Incapable of failure or error
    "an infallible antidote"; "an infallible memory"; "the Catholic Church considers the Pope infallible"; "no doctor is infallible"

See also: foolproof, idiot-proof [informal], inerrable, inerrant, unerring, unfailing

Antonym: fallible

Encyclopedia: Infallible

Nearest

inexpungeable
inexpungible
inextensible
inexterminable
inextinguishable
inextirpable
inextricable
inextricably
infall
infallibility
infallible
infallibly
infamous
infamously
infamy
infancy
infant
infant death
infant deathrate
infant feeding
infant mortality