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English definition of “infallible”

infallible

adjective [not gradable]    /ɪnˈfæl·ə·bəl/
never wrong, or never failing: Memory is not infallible. infallibility    /ɪnˌfæl·əˈbɪl·ɪ·t̬i/ noun [U] His stubborn belief in his own infallibility kept him from listening to others.
(Definition of infallible adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
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