tireless
adjective
tire·less
ˈtī(-ə)r-ləs 
: 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
The midfield three is largely set, with Alan Franco and Pedro Vite likely to join the tireless Moises Caicedo, but young Kendry Paez will fight for his place, despite disappointing loan spells at Strasbourg and River Plate this season.
—
Nnamdi Onyeagwara, New York Times, 1 June 2026
Wildmon applied this knowledge to a tireless quest to reform American popular culture.
—Isaac Butler, New Yorker, 30 May 2026
If vice president of operations Chip Conway, a tireless worker in a thankless job, books the wrong hotel he will likely be forced to run back to Denver.
—Troy Renck, Denver Post, 15 May 2026
To those who disagreed with him, Adams was a tireless pest trying to force his views onto more moderate and prudent men.
—Literary Hub, 13 May 2026
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Nnamdi Onyeagwara, New York Times, 1 June 2026
Wildmon applied this knowledge to a tireless quest to reform American popular culture.
—Isaac Butler, New Yorker, 30 May 2026
If vice president of operations Chip Conway, a tireless worker in a thankless job, books the wrong hotel he will likely be forced to run back to Denver.
—Troy Renck, Denver Post, 15 May 2026
To those who disagreed with him, Adams was a tireless pest trying to force his views onto more moderate and prudent men.
—Literary Hub, 13 May 2026
See All Example Sentences for tireless
Cite this Entry
“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 10 Jun. 2026.
Copy CitationKids Definition
tireless
adjective
tire·less
ˈtī(ə)r-ləs
: seeming never to get tired
a tireless worker
tirelessly
adverb
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