in·​de·​fat·​i·​ga·​ble | \ ˌin-di-ˈfa-ti-gə-bəl How to pronounce indefatigable (audio) \

Definition of indefatigable

: incapable of being fatigued : untiring an indefatigable worker

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Other Words from indefatigable

indefatigability \ ˌin-​di-​ˌfa-​ti-​gə-​ˈbi-​lə-​tē How to pronounce indefatigability (audio) \ noun
indefatigableness \ ˌin-​di-​ˈfa-​ti-​gə-​bəl-​nəs How to pronounce indefatigableness (audio) \ noun
indefatigably \ ˌin-​di-​ˈfa-​ti-​gə-​blē How to pronounce indefatigably (audio) \ 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

Support for the law was driven by Walter Plecker, then-registrar of the state’s Bureau of Vital Statistics and an indefatigable racist. Rachel Weiner, Washington Post, "‘Aryan’ and ‘Octoroon’: Couples challenge racial labels to get married in Virginia," 6 Sep. 2019 And so Thompson, an indefatigable explorer of the labs’ nooks and crannies, finally found that PDP-7 shortly after Davis and Baker cancelled Multics. Richard Jensen, Ars Technica, "Unix at 50: How the OS that powered smartphones started from failure," 29 Aug. 2019 In fact, the onstage camaraderie between the indefatigable Hancock -- whose keyboard wizardry still mesmerizes -- and the band (all accomplished players in their own right) brought an extra depth to the performances. Gail Mitchell, Billboard, "Herbie Hancock Brings Robert Glasper, Terrace Martin & More to Hollywood Bowl," 22 Aug. 2019 Trump is utterly indefatigable, and many of us are exhausted. Yvonne Abraham,, "‘It’s no surprise, because Donald Trump hates us’: At a Chelsea church, congregants say they’re scared," 7 Aug. 2019 Witherspoon's most recent role, as the indefatigable Monterey momma bear Madeline Martha Mackenzie is a master class in playing both sides of the likability coin. Chloe Foussianes, Town & Country, "How Reese Witherspoon Built an Empire Out of Blonde Ambition," 31 July 2019 In many respects, Lee served as the comics industry's goodwill ambassador and indefatigable cheerleader during the medium's formative modern era in the 1960s and thereafter, before Marvel became a dominant force at the box office. Brian Lowry, CNN, "Comic-Con swings into 50th year with tributes to Stan Lee," 17 July 2019 But Years and Years still takes time for a moment of drunken joy, set to the indefatigable musical stylings of Chumbawamba. Liz Shannon Miller, The Verge, "Russell T. Davies’ miniseries Years and Years is Black Mirror with a heart," 24 June 2019 Thanks to the indefatigable efforts of Balenciaga’s friend and acolyte Hubert de Givenchy, the Palacio Aldamar is now the site of the dedicated Cristóbal Balenciaga Museoa, an institution that has loaned a number of pieces to this exhibition. Hamish Bowles, Vogue, "“Balenciaga and Spanish Painting” Opens at the Thyssen-Bornemisza Museum in Madrid," 21 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'indefatigable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of indefatigable

1608, in the meaning defined above

History and Etymology for indefatigable

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

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Learn More about indefatigable

Dictionary Entries near indefatigable


in deep shit



in default


in defeat

Statistics for indefatigable

Last Updated

5 Oct 2019

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Time Traveler for indefatigable

The first known use of indefatigable was in 1608

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More Definitions for indefatigable



English Language Learners Definition of indefatigable

formal : able to work or continue for a very long time without becoming tired

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More from Merriam-Webster on indefatigable

Thesaurus: All synonyms and antonyms for indefatigable

Spanish Central: Translation of indefatigable

Nglish: Translation of indefatigable for Spanish Speakers

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