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
In May 2010, Shannan Gilbert went missing in the community of Oak Beach after visiting a client, and her mother began a tireless quest to pressure police to search for her and take her case seriously.
—
Nicki Brown, CNN Money, 8 Apr. 2026
Rod has been a tireless advocate for delivering climate solutions and a better life for Americans through the development of world-class rail systems.
—Sal Pizarro, Mercury News, 4 Apr. 2026
Thanks to the team’s tireless efforts, the Aluminum Narwhals were able to win the entire event and earn recognition through FIRST’s Excellence in Engineering Award, the second in the entire history of the team.
—News Release, San Diego Union-Tribune, 28 Mar. 2026
Rather, our liberties would be saved by the ragtag battalions of night people doing their tireless work, unpaid, unheralded, and largely unseen.
—Daniel Brook, Harpers Magazine, 24 Mar. 2026
See All Example Sentences for tireless
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Nicki Brown, CNN Money, 8 Apr. 2026
Rod has been a tireless advocate for delivering climate solutions and a better life for Americans through the development of world-class rail systems.
—Sal Pizarro, Mercury News, 4 Apr. 2026
Thanks to the team’s tireless efforts, the Aluminum Narwhals were able to win the entire event and earn recognition through FIRST’s Excellence in Engineering Award, the second in the entire history of the team.
—News Release, San Diego Union-Tribune, 28 Mar. 2026
Rather, our liberties would be saved by the ragtag battalions of night people doing their tireless work, unpaid, unheralded, and largely unseen.
—Daniel Brook, Harpers Magazine, 24 Mar. 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 12 Apr. 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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