incapable of being tired out; not yielding to fatigue; untiring.
- in·de·fat·i·ga·bil·i·ty, in·de·fat·i·ga·ble·ness, noun
- in·de·fat·i·ga·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use indefatigable in a sentence
Unless you’re an indefatigable, insatiable scholar or fan, you wouldn’t want to read Highsmith’s diaries and notebooks in one sitting.After 1,000 pages, you’ll hunger for more Highsmith | Kathi Wolfe | December 11, 2021 | Washington Blade
On the track, the indefatigable Czech was called the “Colossus,” set 17 world records up to 30K, and in the three-year build up to the Games he compiled a streak of 69 wins over 5,000m and 10,000m.As Sifan Hassan Attempts Olympic Triple, a Look at Historic Multi-Medalists | jversteegh | August 4, 2021 | Outside Online
As the indefatigable, utterly lovable Mal, Archie Renaux brings the heart.Netflix’s ‘Shadow and Bone’ Is a Chaotic, Confounding, Totally Engrossing Ride | Laura Bradley | April 23, 2021 | The Daily Beast
We’d also like to thank the indefatigable Jesse von Doom for helping us mind our schedules and keep our project running on time.
Because the man is an indefatigable scholar of the game — he studies it as hard as maybe any quarterback but Tom Brady.Super Bowl highlights: Bucs celebrate championship, Tom Brady wins MVP | Des Bieler, Mark Maske, Chuck Culpepper | February 8, 2021 | Washington Post
“She would be my ‘boss lady,’” Crowe writes of the indefatigable Anne Marie.
Perhaps even the indefatigable John Kerry might be discouraged from more futile and dispiriting peace talks.Here’s What the U.S. Has to Do to Deal With the Mad Middle East | Leslie H. Gelb | July 16, 2014 | THE DAILY BEAST
The exuberant, indefatigable Democrat from Oregon and the dour, taciturn Republican from New Hampshire made an odd couple.The Senate’s New Taxman Won’t Be Controlled By His Own Party | Linda Killian | February 18, 2014 | THE DAILY BEAST
Richard Ben Cramer explores the abduction of Olympic athlete Kari Swenson and the indefatigable sheriff who hunted her abductor.
indefatigable in those two roles, he hankered after others, as well.
His labors were indefatigable, and his works possess great merit.The Every Day Book of History and Chronology | Joel Munsell
There was a successful fishing that year, and Jacob Worse was indefatigable and in high spirits.Skipper Worse | Alexander Lange Kielland
Nothing is more remarkable than the sustained application and indefatigable will which they bring to bear on their studies.Friend Mac Donald | Max O'Rell
She heard unpleasant stories touching him through Sylvana, her nurse, an indefatigable gossip-monger.God Wills It! | William Stearns Davis
The experiments which the indefatigable seeker had undertaken on atmospheric electricity interested her as much as they did him.Urania | Camille Flammarion
British Dictionary definitions for indefatigable
unable to be tired out; unflagging
- indefatigability or indefatigableness, noun
- indefatigably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012