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
MacKinnon Chapman thanked the nonprofits for their tireless efforts that have strengthened communities and provided hope to countless individuals.
—
News Release, San Diego Union-Tribune, 8 Feb. 2026
The brazen assassination in 2017 of Valdez — a tireless chronicler of cartel violence and politicians’ links to organized crime — sparked international condemnation.
—Foreign Correspondent, Los Angeles Times, 7 Feb. 2026
Fieri has become one of the Food Network's most tireless soldiers ever since his Food Network Star win.
—Ryan Coleman, Entertainment Weekly, 5 Feb. 2026
With his love for our country and tireless commitment to our security and democracy, Lee was a leading figure who helped propel me into my own life of public service.
—Hayleigh Colombo, IndyStar, 4 Feb. 2026
See All Example Sentences for tireless
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News Release, San Diego Union-Tribune, 8 Feb. 2026
The brazen assassination in 2017 of Valdez — a tireless chronicler of cartel violence and politicians’ links to organized crime — sparked international condemnation.
—Foreign Correspondent, Los Angeles Times, 7 Feb. 2026
Fieri has become one of the Food Network's most tireless soldiers ever since his Food Network Star win.
—Ryan Coleman, Entertainment Weekly, 5 Feb. 2026
With his love for our country and tireless commitment to our security and democracy, Lee was a leading figure who helped propel me into my own life of public service.
—Hayleigh Colombo, IndyStar, 4 Feb. 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 15 Feb. 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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