indefatigable

adjective

ˌin-di-ˈfa-ti-gə-bəl How to pronounce indefatigable (audio)
Definition of indefatigablenext
as in meticulous
showing no signs of weariness even after long hard effort an indefatigable laborer who can work from sunrise to sunset

Synonyms & Similar Words

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Antonyms & Near Antonyms

Example Sentences

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.
Recent Examples of indefatigable Walter would become my indispensable, indefatigable partner in every endeavor that followed. — Bill Frist, Forbes.com, 30 June 2026 The audience and the other participants go to great lengths each season to insure the safety of the few indefatigable girls who impress us with their authenticity and make full use of their latitude to become tragic heroines. — Lillian Fishman, New Yorker, 27 June 2026 And while Tom Loftis might not exactly be an indefatigable optimist like Parks and Rec’s Leslie Knope, he’s driven by a passion for civic improvement — and, of course, a desire to show up Eagleton Martha’s Vineyard. — Keith Phipps, Vulture, 15 June 2026 Even the indefatigable Thunder will face uncomfortable decisions this summer (and next) as its payroll spikes into the second apron. — Bennett Durando, Denver Post, 7 June 2026 See All Example Sentences for indefatigable
Recent Examples of Synonyms for indefatigable
  1. meticulous
  2. tireless
  3. relentless
  4. untiring
  5. unflagging
  6. conscientious
  7. inexhaustible
  8. vigorous
Adjective
  • Across the show’s three seasons, Rodriguez plays Jackie Howard, a New York native who prides herself on organization and meticulous planning.
    — Rosy Cordero, Deadline, 17 Aug. 2026
  • Schuler said that is made possible by sourcing good-quality meats from local providers, making meticulous measurements for every meal and preparing the options without so much oil and butter.
    — Shannon Tyler, Idaho Statesman, 17 Aug. 2026
Definition of meticulous
Adjective
  • Banks, the first saxophonist to receive the prestigious Avery Fisher Award, is a tireless advocate for his instrument in the classical world.
    — Beth Wood, San Diego Union-Tribune, 16 Aug. 2026
  • Provided with hope for the first time since their struggles began and with the support of a tireless counselor (Annette Deao), the brothers work toward a brighter, sober future.
    — Jill Goldsmith, Deadline, 14 Aug. 2026
Definition of tireless
Adjective
  • But his effort is the real X-factor, as Pierre’s relentless approach to every rep can be difficult for offensive linemen to endure over the course of a game.
    — Nick Baumgardner, New York Times, 19 Aug. 2026
  • The longest track on the album at more than eight minutes, it’s built around a relentless two-note bass line and dangerously cowbell-adjacent percussion and features a whirlwind of samples and sweetly noisy meltdowns.
    — Reed Jackson, SPIN, 19 Aug. 2026
Definition of relentless
Adjective
  • All speakers paid tribute to Jack Gross, owner of the new station, for his untiring efforts to bring San Diego its own television station.
    — sandiegouniontribune.com, sandiegouniontribune.com, 17 May 2018
  • Still, Clark's adrenaline and untiring preparation propelled her to a second place finish in Oslo and a third place finish at the Burton US Open the following month.
    — Nihal Kolur, SI.com, 30 Oct. 2017
Definition of untiring
Adjective
  • Tristan is the ultramarathon of opera roles, long and punishing, and not many tenors carry it off with such unflagging grace.
    — Justin Davidson, Vulture, 11 Mar. 2026
  • The new press release appears to tout that same unflagging punk ethos.
    — Connie Ogle, Miami Herald, 29 Aug. 2025
Definition of unflagging
Adjective
  • What’s more, not all protein powders are equal, so a conscientious approach is warranted.
    — Martha Stewart, Martha Stewart, 12 Aug. 2026
  • Even the most conscientious hand washers who use a basin or a full sink still use two to four times as much water as the average dishwasher cycle.
    — Mary Cornetta, Better Homes & Gardens, 26 July 2026
Definition of conscientious
Adjective
  • In 1922, when the river’s waters ⁠seemed inexhaustible, the seven states created a water-sharing compact dictating how much Upper and Lower Basin states receive.
    — Reuters, NBC news, 31 July 2026
  • Materials, like symbols, are recycled across sculptures and tableaux in an inexhaustible loop.
    — Tara Anne Dalbow, Los Angeles Times, 15 July 2026
Definition of inexhaustible
Adjective
  • The entity has embarked on a vigorous program of experiences and other projects to introduce the legendary band to a new generation of fans.
    — K.J. Yossman, Variety, 19 Aug. 2026
  • There is a vigorous double jeopardy statute in New York state.
    — Jesse Zanger, CBS News, 17 Aug. 2026
Definition of vigorous

Browse Nearby Words

in deep water
indefatigable
indefatigably
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Cite this Entry

“Indefatigable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/indefatigable. Accessed 22 Aug. 2026.

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Nglish: Translation of indefatigable for Spanish Speakers

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