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
And for the tireless efforts of the Society’s 2,000 members and donors, the basin remains a destination for nature lovers who track white pelicans, geese, cormorants, herons and other birds in a 2,150-acre playground filled with native plants.
—
Daily News, 16 Apr. 2026
Francis was also a tireless advocate for peace in Gaza, and would call Gaza's Church of the Holy Family nightly during the war between Hamas and Israel.
—Ava Berger, NPR, 15 Apr. 2026
But those tireless days lent him the discipline required to pursue a career in tech, and motivated him to improve the agricultural business.
—Jake Angelo, Fortune, 13 Apr. 2026
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
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.
Daily News, 16 Apr. 2026
Francis was also a tireless advocate for peace in Gaza, and would call Gaza's Church of the Holy Family nightly during the war between Hamas and Israel.
—Ava Berger, NPR, 15 Apr. 2026
But those tireless days lent him the discipline required to pursue a career in tech, and motivated him to improve the agricultural business.
—Jake Angelo, Fortune, 13 Apr. 2026
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
See All Example Sentences for tireless
Cite this Entry
“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 28 Apr. 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
