tireless

[ tahyuhr-lis ]
/ ˈtaɪər lɪs /

adjective

untiring; indefatigable: a tireless worker.

Nearby words

  1. tire iron,
  2. tired,
  3. tired out,
  4. tiredness,
  5. tiree,
  6. tirelessly,
  7. tiresias,
  8. tiresome,
  9. tiresomely,
  10. tirewoman

Origin of tireless

First recorded in 1585–95; tire1 + -less

Related formstire·less·ly, adverbtire·less·ness, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tirelessly


British Dictionary definitions for tirelessly

tireless

/ (ˈtaɪəlɪs) /

adjective

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