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
Cristobal studies tape of every player UM signs, but Smith does a lot of the necessary legwork, because even Cristobal — with his tireless work ethic — can’t do everything.
—
Barry Jackson,
Miami Herald,
3 July 2026
Technically gifted, fearless, tireless, and always ready to fight for the badge.
—
Tim Spiers,
New York Times,
30 June 2026
Based on extensive research and conversations with Ms Lee, her family and others in her circle, Roché’s narrative emphasizes how much faith, patience and tireless effort was required of Lee’s generation just to secure the basic dignities of American citizenship.
—
Rob Salkowitz,
Forbes.com,
19 June 2026
For those performances, not only did an excitedly tireless Conlon spend an hour before performances in the talks, but afterward, despite operas that lasted five hours or more, he could be found behind the bar at Kendell’s, the theater’s downstairs brasserie, serving drinks.
—
Mark Swed,
Los Angeles Times,
18 June 2026
See All Example Sentences for tireless
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Barry Jackson,
Miami Herald,
3 July 2026
Technically gifted, fearless, tireless, and always ready to fight for the badge.
—
Tim Spiers,
New York Times,
30 June 2026
Based on extensive research and conversations with Ms Lee, her family and others in her circle, Roché’s narrative emphasizes how much faith, patience and tireless effort was required of Lee’s generation just to secure the basic dignities of American citizenship.
—
Rob Salkowitz,
Forbes.com,
19 June 2026
For those performances, not only did an excitedly tireless Conlon spend an hour before performances in the talks, but afterward, despite operas that lasted five hours or more, he could be found behind the bar at Kendell’s, the theater’s downstairs brasserie, serving drinks.
—
Mark Swed,
Los Angeles Times,
18 June 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 5 Jul. 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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