infallible

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infallible /ɪnˈfæləbəl/ adjective
infallible
/ɪnˈfæləbəl/
adjective
Learner's definition of INFALLIBLE
: not capable of being wrong or making mistakes : not fallible
: certain to work properly or succeed

— infallibility

/ɪnˌfæləˈbɪləti/ noun [noncount]

— infallibly

/ɪnˈfæləbli/ adverb