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tireless

[ tahyuhr-lis ]
/ ˈtaɪər lɪs /
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See synonyms for: tireless / tirelessly / tirelessness on Thesaurus.com

adjective
untiring; indefatigable: a tireless worker.
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Origin of tireless

First recorded in 1585–95; tire1 + -less

OTHER WORDS FROM tireless

tire·less·ly, adverbtire·less·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use tireless in a sentence

British Dictionary definitions for tireless

tireless
/ (ˈtaɪəlɪs) /

adjective
unable to be tired; indefatigable

Derived forms of tireless

tirelessly, 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
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