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 first group will desperately fight for relevance against AI tools that are faster, cheaper, and tireless.
—
Big Think, 26 Nov. 2025
This Thanksgiving, my heart is filled with gratitude for the tireless efforts of America’s farmers and ranchers to produce an abundant and affordable food supply.
—MSNBC Newsweek, 25 Nov. 2025
Yet Kunken gives the character a roguish charisma, in his tireless defense of American freedom, that Biniaz couldn’t help observing was arguably fictional.
—Ben McGrath, New Yorker, 24 Nov. 2025
During the next two months, our reporters will spotlight stories of individuals whose lives have been transformed by the tireless work of their neighbors, showing the human impact behind every donation.
—Silvia Solis, AZCentral.com, 23 Nov. 2025
See All Example Sentences for tireless
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Big Think, 26 Nov. 2025
This Thanksgiving, my heart is filled with gratitude for the tireless efforts of America’s farmers and ranchers to produce an abundant and affordable food supply.
—MSNBC Newsweek, 25 Nov. 2025
Yet Kunken gives the character a roguish charisma, in his tireless defense of American freedom, that Biniaz couldn’t help observing was arguably fictional.
—Ben McGrath, New Yorker, 24 Nov. 2025
During the next two months, our reporters will spotlight stories of individuals whose lives have been transformed by the tireless work of their neighbors, showing the human impact behind every donation.
—Silvia Solis, AZCentral.com, 23 Nov. 2025
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 Dec. 2025.
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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