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 two have bonded over their desire to get better and their tireless work ethics, and that relationship has only been fortified as the years have progressed.
—
Jordan McPherson, Miami Herald, 28 Sep. 2025
In other words, simply the continuation of the current environment – a steady economy, flexibly supportive policy and tireless aggression among the builders of AI infrastructure – could be enough for a while.
—Michael Santoli, CNBC, 20 Sep. 2025
Courageous advocates, tireless researchers and others emerged as a coalition to fight the epidemic.
—Pearl Pugh, Forbes.com, 19 Sep. 2025
Both are wicked smart brainiacs on a tireless quest to do good in the world.
—Natasha Stoynoff, PEOPLE, 7 Sep. 2025
See All Example Sentences for tireless
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Jordan McPherson, Miami Herald, 28 Sep. 2025
In other words, simply the continuation of the current environment – a steady economy, flexibly supportive policy and tireless aggression among the builders of AI infrastructure – could be enough for a while.
—Michael Santoli, CNBC, 20 Sep. 2025
Courageous advocates, tireless researchers and others emerged as a coalition to fight the epidemic.
—Pearl Pugh, Forbes.com, 19 Sep. 2025
Both are wicked smart brainiacs on a tireless quest to do good in the world.
—Natasha Stoynoff, PEOPLE, 7 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 4 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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