Indefatigably

//ˌɪndəˈfætəɡəbli// adv

Definitions

Adverb
  1. 1
    In an extremely persistent and untiring manner; in an indefatigable manner

    "Silence, silence,’ the trumpet mouths indefatigably repeated at intervals down every corridor."

Adverb
  1. 1
    with indefatigable energy wordnet

Etymology

From indefatigable + -ly, but indefatigable itself was attested later. In use since the 16th century.

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