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
Across five years of tireless activity, Taylor Swift has repeatedly envisioned herself in the shoes of doomed women in history and literature while coping with stress and public-relations disasters.
—
Craig Jenkins, Vulture, 3 Oct. 2025
Jane Goodall was a pioneer, a tireless advocate and a deeply compassionate conservationist who inspired others to care about primates — and all animals — during a long life well lived, according to tributes from around the world.
—Preston Fore, Fortune, 2 Oct. 2025
And finally, by surveying the harsh reality faced by tireless humanitarian volunteers who know firsthand about failures in the system.
—Randy Myers, Mercury News, 30 Sep. 2025
And, after 11 years of frequent wheeling and dealing, who exactly is baseball’s most tireless, eccentric general manager?
—Brittany Ghiroli, New York Times, 29 Sep. 2025
See All Example Sentences for tireless
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Craig Jenkins, Vulture, 3 Oct. 2025
Jane Goodall was a pioneer, a tireless advocate and a deeply compassionate conservationist who inspired others to care about primates — and all animals — during a long life well lived, according to tributes from around the world.
—Preston Fore, Fortune, 2 Oct. 2025
And finally, by surveying the harsh reality faced by tireless humanitarian volunteers who know firsthand about failures in the system.
—Randy Myers, Mercury News, 30 Sep. 2025
And, after 11 years of frequent wheeling and dealing, who exactly is baseball’s most tireless, eccentric general manager?
—Brittany Ghiroli, New York Times, 29 Sep. 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 7 Oct. 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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