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
Our department is putting in tireless 12-hour shifts to make sure roads are cleared and traffic can move safely again.
—
Ali Bauman, CBS News, 25 Feb. 2026
The man was just a tireless worker and his work ethic was unmatched as a coach.
—Broderick Turner, Los Angeles Times, 22 Feb. 2026
The timing of this recent turn to tanking is just another example of the helpless, tireless tardiness that has plagued the Karnišovas era in Chicago.
—Julia Poe, Chicago Tribune, 21 Feb. 2026
An avatar state—fluent, tireless, and perfectly malleable—would simulate deliberation but without consequence.
—Deb Roy, The Atlantic, 15 Feb. 2026
See All Example Sentences for tireless
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Ali Bauman, CBS News, 25 Feb. 2026
The man was just a tireless worker and his work ethic was unmatched as a coach.
—Broderick Turner, Los Angeles Times, 22 Feb. 2026
The timing of this recent turn to tanking is just another example of the helpless, tireless tardiness that has plagued the Karnišovas era in Chicago.
—Julia Poe, Chicago Tribune, 21 Feb. 2026
An avatar state—fluent, tireless, and perfectly malleable—would simulate deliberation but without consequence.
—Deb Roy, The Atlantic, 15 Feb. 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 4 Mar. 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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