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.
Through her visionary leadership at Morgan Murphy Media and her tireless work with NAB, Liz left an indelible mark on broadcasting that will endure for generations. Todd Spangler, Variety, 25 Apr. 2025 It is achieved through tireless hard work and painstaking analysis. Matt Woosnam, New York Times, 24 Apr. 2025 But at the core of it was her tireless work ethic, and that voice. Leila Cobo, Billboard, 23 Apr. 2025 During Allen’s parole hearing, Jerry Goodwin, then warden at the David Wade Correctional Center in Homer, where Allen was being held, lauded Allen for his tireless work overcoming his drug addictions and improving his communication skills. Richard A. Webster, ProPublica, 10 Apr. 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 30 Apr. 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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