tireless

adjective

tire·​less ˈtī(-ə)r-ləs How to pronounce tireless (audio)
Synonyms of tirelessnext
: 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
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.
If vice president of operations Chip Conway, a tireless worker in a thankless job, books the wrong hotel he will likely be forced to run back to Denver. Troy Renck, Denver Post, 15 May 2026 To those who disagreed with him, Adams was a tireless pest trying to force his views onto more moderate and prudent men. Literary Hub, 13 May 2026 The duo honored the multi-hyphenate for his success as an actor, author, producer and advocate who has established himself as a defining Asian Pacific voice in mainstream Hollywood and a tireless champion for representation on and off screen. Jazz Tangcay, Variety, 10 May 2026 Instead, the tireless singer will be performing multiple times with multiple bands at his San Diego club, The Jazz Lounge. George Varga, San Diego Union-Tribune, 7 May 2026 See All Example Sentences for tireless

Word History

First Known Use

1605, in the meaning defined above

Time Traveler
The first known use of tireless was in 1605

Browse Nearby Words

Cite this Entry

“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 20 May. 2026.

Kids Definition

tireless

adjective
tire·​less ˈtī(ə)r-ləs How to pronounce tireless (audio)
: seeming never to get tired
a tireless worker
tirelessly adverb

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