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tireless

[tahyuh r-lis]
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adjective
  1. untiring; indefatigable: a tireless worker.

Origin of tireless

First recorded in 1585–95; tire1 + -less
Related formstire·less·ly, adverbtire·less·ness, noun

Synonyms

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unwearied, industrious, hardworking, unfaltering.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tirelessly

Contemporary Examples

Historical Examples

  • Despite all obstacles encountered, it tirelessly pursues its way.

    The New World of Islam

    Lothrop Stoddard

  • Tirelessly Juan Can questioned every traveller, every wandering herder he saw.

    Ramona

    Helen Hunt Jackson

  • Yet the statue worked faithfully and tirelessly, and, it must be confessed, hopelessly.

  • We rejoiced momentarily for those who had worked so tirelessly.

    Mariposilla

    Mary Stewart Daggett

  • This, again, is Nature's way, randomly and tirelessly seeking her ends.

    Ways of Nature

    John Burroughs


British Dictionary definitions for tirelessly

tireless

adjective
  1. unable to be tired; indefatigable
Derived Formstirelessly, adverbtirelessness, noun
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

Word Origin and History for tirelessly

tireless

adj.

1590s, "indefatigable," from tire (v.) + -less. From 1862 in the sense "without a tire," from tire (n.). Related: Tirelessly.

Online Etymology Dictionary, © 2010 Douglas Harper