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untiring

adjective
  1. (of a person or their actions) continuing or persisting without declining in strength or vigour
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

constantcontinuingdedicateddevoteddoggedfirmgrindincessantindefatigableindomitableinexhaustiblepatientperkypersistentpertinaciousresolutestaunchsteadystrongtenacious

Examples from the Web for untiring

Historical Examples

  • So they went to work, each in his own way, agreeing mostly in untiring industry.

    Good Indian

    B. M. Bower

  • The only fault that could be found with her was that her devotion was too complete, her service too untiring.

    The Island Mystery

    George A. Birmingham

  • Her interest once excited, Sybella Kellett's zeal was untiring.

  • One becomes an Arahat by a life of strenuous and untiring discipline.

    History of Religion

    Allan Menzies

  • Strenuous, untiring efforts for years have been made to unravel this Lanier web.

    Oswald Langdon

    Carson Jay Lee