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.
Thanks to the indefatigable work of the Harlem African Burial Ground Initiative (HAGBI), helmed by the Rev. Dr. Patricia Singletary of the Elmendorf Reformed Church and former City Council Speaker Melissa Mark-Viverito, the history of the Harlem burial ground has been widely disseminated. Herb Boyd, New York Daily News, 1 Feb. 2025 This may be baffling to the internet’s many Last Showgirl skeptics, but chalk it up to her indefatigable campaigning, as well as the Everything Everywhere All at Once afterglow. Nate Jones, Vulture, 18 Jan. 2025 The group also questions the drama’s source material: the book The Lockerbie Bombing – A Father’s Search for Justice by Jim Swire, the indefatigable doctor portrayed by Firth. Jake Kanter, Deadline, 24 Jan. 2025 In addition to four NBA championships and a lucrative career as an NBA analyst, O’Neal is an indefatigable advertising pitchman and is a national spokesperson for the Boys and Girls Club of America. Jabari Young, Forbes, 1 Sep. 2024 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

Dictionary Entries Near indefatigable

Cite this Entry

“Indefatigable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indefatigable. Accessed 13 Feb. 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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