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
Through the protests in the streets of Iran and the tireless advocacy of the diaspora, the Iranian people’s desire for a secular democracy and rule of law is undeniable.
—
Derek Tran, Oc Register, 6 Mar. 2026
The center was established to honor not only his father but also as a tribute to his mother, Doris, and sister, Nancy, for their tireless dedication to the caregiving of his dad.
—Ryan Brennan, Miami Herald, 3 Mar. 2026
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
See All Example Sentences for tireless
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Derek Tran, Oc Register, 6 Mar. 2026
The center was established to honor not only his father but also as a tribute to his mother, Doris, and sister, Nancy, for their tireless dedication to the caregiving of his dad.
—Ryan Brennan, Miami Herald, 3 Mar. 2026
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
See All Example Sentences for tireless
Cite this Entry
“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 11 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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