tireless

adjective

tire·​less ˈtī(-ə)r-ləs How to pronounce tireless (audio)
: seemingly incapable of tiring : indefatigable
a tireless worker
tirelessly adverb
tirelessness noun

Examples of tireless in a Sentence

She has been a tireless advocate for reform. a tireless advocate for human rights
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Most of the early reporting was done by Townsend Miller, a tireless champion of progressive country who probably does not receive enough credit for the rise of that genre during this period. Michael Barnes, Austin American Statesman, 2 July 2025 This would not have been possible without tireless work from our excellent lawyers @TheJusticeDept and our Solicitor General John Sauer. Hollie Silverman, MSNBC Newsweek, 29 June 2025 Thanks to the tireless work of Photopia and the many artists, educators, and institutions involved, Cairo Photo Week is fostering a space where ideas can take root and visions can evolve. Daniel Rodríguez Gordillo, Vogue, 26 June 2025 The cornerstones of maps’ data pools are satellite images and a tireless fleet of Street View cars that roam with ungainly camera hats, constantly refreshing neighborhood-level detail. Sonya Bennett-Brandt, AFAR Media, 25 June 2025 See All Example Sentences for tireless

Word History

First Known Use

1591, in the meaning defined above

Time Traveler
The first known use of tireless was in 1591

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Cite this Entry

“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 11 Jul. 2025.

Kids Definition

tireless

adjective
tire·​less ˈtī(ə)r-ləs How to pronounce tireless (audio)
: seeming never to get tired
a tireless worker
tirelessly adverb

More from Merriam-Webster on tireless

Last Updated: - Updated example sentences
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