INDEFATIGABLE


Meaning of INDEFATIGABLE in English

[ ˌɪndɪ'fatɪgəb(ə)l ]

■ adjective persisting tirelessly; unflagging.

Derivatives

indefatigability noun

indefatigably adverb

Origin

C17: from Fr., or from L. indefatigabilis , from in- 'not' + de- 'away, completely' + fatigare 'wear out'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.