Indefatigable - definition of . . . - The Free Dictionary indefatigable - showing sustained enthusiastic action with unflagging vitality; "an indefatigable advocate of equal rights"; "a tireless worker"; "unflagging pursuit of excellence"
indefatigable - Wiktionary, the free dictionary indefatigable (comparative more indefatigable, superlative most indefatigable) Extremely persistent and untiring Synonyms: inexhaustible, relentless, tireless, unflagging, unsinkable, untiring, unwearying Antonym: (much less common) defatigable
INDEFATIGABLE definition and meaning | Collins English Dictionary You use indefatigable to describe someone who never gets tired of doing something His indefatigable spirit helped him to cope with his illness He was indefatigable in his efforts to secure funding for new projects She worked indefatigably and enthusiastically to interest the young in music Collins COBUILD Advanced Learner’s Dictionary