9 Grammatical Pitfalls


[tahyuh r-lis] /ˈtaɪər lɪs/
untiring; indefatigable:
a tireless worker.
Origin of tireless
1585-95; tire1 + -less
Related forms
tirelessly, adverb
tirelessness, noun
unwearied, industrious, hardworking, unfaltering. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for tirelessly
  • Researchers are tirelessly working on ways to combat mental illness.
  • Regardless of gender or religion, the country worked tirelessly as a unit to change their history.
  • Nightingale worked tirelessly caring for the soldiers.
  • Bearing in mind what is at stake, tirelessly underlining this point is ridiculous.
  • We have worked, and continue to work tirelessly to develop our brands into the best in the adult entertainment sector.
  • He finds possessions oppressive and has tirelessly pursued an existence in which he would be free of all burdens.
  • Best of all, it works tirelessly and behaves itself, even when you're not watching.
  • Second, campus leaders and trustees must start working tirelessly for deregulation.
  • He traveled tirelessly, supervising workers wherever they were.
  • Some stars work tirelessly on behalf of certain charities.
British Dictionary definitions for tirelessly


unable to be tired; indefatigable
Derived Forms
tirelessly, adverb
tirelessness, 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
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Word Origin and History for tirelessly



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
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