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HOW TO PRONOUNCE

indefatigable

/ˌɪn.dəˈfæt.ɪ.ɡə.bəl/

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What does indefatigable mean?

adjective

  1. Extremely persistent and untiring.

proper noun

  1. Synonym of Santa Cruz, an island of Galapagos, Ecuador.

Definitions regrouped for readability · CC BY-SA 4.0

IPA pronunciation

/ˌɪn.dəˈfæt.ɪ.ɡə.bəl/

Wiktionary contributors · CC BY-SA 4.0

Pronunciation varies by speaker and region. About these dictionary pronunciations.

In the pages of books

See this word in context.

Kepler's laws were the result of indefatigable guessing, and so, in a somewhat different sense, was the wave-theory of light.
John FiskeThe Unseen World, and Other EssaysProject Gutenberg ebook #1486
And in these pursuits the indefatigable men who were dedicated to them, were not even goaded by the love of fame.
William GodwinThoughts on Man, His Nature, Productions and Discoveries Interspersed with Some Particulars Respecting the AuthorProject Gutenberg ebook #743
More book examples (3)
This indefatigable man continued to urge his various designs upon the attention of the public until he was far advanced in years.
Samuel SmilesIndustrial Biography: Iron Workers and Tool MakersProject Gutenberg ebook #404
Not content with having deserved it, before he got it, by distinguished bravery and indefatigable duty, he persists in meriting it still.
Horace WalpoleThe Letters of Horace Walpole, Earl of Orford — Volume 2Project Gutenberg ebook #4610
Captain Templer was an indefatigable worker and he brought the ballooning section to a high degree of efficiency from the military point of view.
Frederick Arthur Ambrose TalbotAeroplanes and Dirigibles of WarProject Gutenberg ebook #793