indefatigable

adjective

in·​de·​fat·​i·​ga·​ble ˌin-di-ˈfa-ti-gə-bəl How to pronounce indefatigable (audio)
: incapable of being fatigued : untiring
an indefatigable worker
indefatigability noun
indefatigableness noun
indefatigably adverb

Examples of indefatigable in a Sentence

a person of indefatigable patience an indefatigable laborer who can work from sunrise to sunset
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.
By a long shot, the most exciting new steak house in New York right now is La Tête d’Or by Daniel, the latest restaurant from the indefatigable French chef and restaurateur Daniel Boulud, who for more than three decades has embodied the soigné sophistication of ultra-high-end dining in New York. Helen Rosner, The New Yorker, 16 Mar. 2025 But Christine and Pam [Koffler] at Killer Films are just so indefatigable in their insistence that there’s going to be a way to figure this out, again. Scott Roxborough, The Hollywood Reporter, 18 Feb. 2025 Tom Fitzmorris, the indefatigable chronicler of New Orleans food culture has died at the age of 74 from Alzheimer’s disease. John Mariani, Forbes, 25 Feb. 2025 His Weekend Update favorite Willie, meanwhile, makes the concept of smiling through the unthinkable uniquely funny, with Thompson's indefatigable charm buoying us as much as poor Willie himself. Dennis Perkins, EW.com, 16 Feb. 2025 See All Example Sentences for indefatigable

Word History

Etymology

Middle French, from Latin indefatigabilis, from in- + defatigare to fatigue, from de- + fatigare to fatigue

First Known Use

1608, in the meaning defined above

Time Traveler
The first known use of indefatigable was in 1608

Browse Nearby Words

Cite this Entry

“Indefatigable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indefatigable. Accessed 29 Mar. 2025.

Kids Definition

indefatigable

adjective
in·​de·​fat·​i·​ga·​ble ˌin-di-ˈfat-i-gə-bəl How to pronounce indefatigable (audio)
: capable of working a long time without tiring : tireless
an indefatigable teacher
indefatigably adverb

More from Merriam-Webster on indefatigable

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