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
Bob Weir, a founding member of the Grateful Dead whose rhythm guitar work, songwriting and tireless touring helped push traditional American blues and folk music into the modern era, has died, according to a statement posted Saturday to his official website.
—
Dennis Romero, NBC news, 10 Jan. 2026
In the meantime, however, the tireless work of humanitarians continues on the ground, with no end to the fighting in sight.
—Byguy Davies, ABC News, 9 Jan. 2026
When appearing off the bench, Guiu’s inexperience sometimes shows, but his tireless pressing will appeal to Rosenior, who wants an energetic and front-footed approach and is willing to give raw talents a try.
—Cerys Jones, New York Times, 9 Jan. 2026
Democratic Senator Chris Van Hollen praised Hoyer's tireless dedication to passing Democratic priorities and his commitment to racial and social justice.
—Jt Moodee Lockman, CBS News, 8 Jan. 2026
See All Example Sentences for tireless
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Dennis Romero, NBC news, 10 Jan. 2026
In the meantime, however, the tireless work of humanitarians continues on the ground, with no end to the fighting in sight.
—Byguy Davies, ABC News, 9 Jan. 2026
When appearing off the bench, Guiu’s inexperience sometimes shows, but his tireless pressing will appeal to Rosenior, who wants an energetic and front-footed approach and is willing to give raw talents a try.
—Cerys Jones, New York Times, 9 Jan. 2026
Democratic Senator Chris Van Hollen praised Hoyer's tireless dedication to passing Democratic priorities and his commitment to racial and social justice.
—Jt Moodee Lockman, CBS News, 8 Jan. 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 17 Jan. 2026.
Copy CitationKids Definition
tireless
adjective
tire·less
ˈtī(ə)r-ləs
: seeming never to get tired
a tireless worker
tirelessly
adverb
Love words? Need even more definitions?
Merriam-Webster unabridged
