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[ US /ˌɪndɪˈfætɪɡəbəɫ/ ]
[ UK /ˌɪndɪfˈætɪɡəbə‍l/ ]
  1. showing sustained enthusiastic action with unflagging vitality
    a tireless worker
    unflagging pursuit of excellence
    an indefatigable advocate of equal rights
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How To Use indefatigable In A Sentence

  • There was less to fear from the “indefatigable,” a young man just come out or an old beau who danced indiscriminately with any and all women, and the “indispensable,” the anxious fetcher and carrier of wraps, gloves, lemonade, fans and ices, but a young lady was introduced to as many approved and eligible men as quickly as possible. La Jeune fille à marier | Edwardian Promenade
  • She was indefatigable in her search for the truth.
  • However, the referee was unsighted and disallowed the score but the indefatigable Ainslie peeled off a maul two minutes later to touch down next to the posts for Mitchell to convert.
  • One can only salute such indefatigable souls, and wish them success in their efforts.
  • And it was a shining example of how history is really forged, not recorded, baptized in the indefatigable whirl of media spin.
  • More than a few antiques dealers start out as indefatigable collectors who make the decision to turn their avocation into a vocation.
  • In "Blink of an Eye," Mr. Cohen spins a fantastical tale of a nuclear device that devastates Savannah, Ga., forcing a too-good-for-Washington president and his indefatigable aide to fight the forces of reaction—those knuckle-dragging American religious fanatics desperate to pin the attack on Iranian religious fanatics. The Tedium Is the Message
  • It was grumbled out in short spasmodic sentences between the slow whiffs of his pipe, as he sat by the fire in a little parlour off the hall, with his indefatigable daughter at work at a table near him. Fenton's Quest
  • An indefatigable advocate of equal rights; a tireless worker; unflagging pursuit of excellence.
  • A whistle-stop tour of the home of Renaissance painting, by gondola, vaporetto and on foot, with Sir Tim as our indefatigable guide.
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