indefatigable
adjective
in·de·fat·i·ga·ble
ˌin-di-ˈfa-ti-gə-bəl 
: incapable of being fatigued : untiring
an indefatigable worker
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
The Shark, so named early on for his intensity as basketball coach, dean and indefatigable fundraiser, stepped down from the Columbus presidency in 2018 but assumed his current, and final, role.
—
Howard Cohen, Miami Herald, 1 June 2026
At St James’ Park in September, when Gordon scored a late consolation in a 2-1 defeat, and for 45 minutes in Catalonia in March, before Newcastle’s embarrassing second-half collapse to a 7-2 defeat, Barcelona witnessed the forward’s devastating pace and indefatigable work ethic first hand.
—Pol Ballús, New York Times, 29 May 2026
Harry Styles' stage is a pop playground Styles’ laudable core band – anchored by his longtime drummer, the indefatigable Sarah Jones, who makes tricky beats look simple – was augmented by strings and horns on several tracks, a testament to his ambitious musical aspirations.
—Melissa Ruggieri, USA Today, 17 May 2026
Through indefatigable research, Kara fixes poorly remembered facts and makes a decent case that the publicity galvanized the movement to abolish British slavery a half century later.
—The Atlantic, 14 May 2026
See All Example Sentences for indefatigable
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Howard Cohen, Miami Herald, 1 June 2026
At St James’ Park in September, when Gordon scored a late consolation in a 2-1 defeat, and for 45 minutes in Catalonia in March, before Newcastle’s embarrassing second-half collapse to a 7-2 defeat, Barcelona witnessed the forward’s devastating pace and indefatigable work ethic first hand.
—Pol Ballús, New York Times, 29 May 2026
Harry Styles' stage is a pop playground Styles’ laudable core band – anchored by his longtime drummer, the indefatigable Sarah Jones, who makes tricky beats look simple – was augmented by strings and horns on several tracks, a testament to his ambitious musical aspirations.
—Melissa Ruggieri, USA Today, 17 May 2026
Through indefatigable research, Kara fixes poorly remembered facts and makes a decent case that the publicity galvanized the movement to abolish British slavery a half century later.
—The Atlantic, 14 May 2026
See All Example Sentences for indefatigable
Cite this Entry
“Indefatigable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indefatigable. Accessed 5 Jun. 2026.
Copy CitationKids Definition
indefatigable
adjective
in·de·fat·i·ga·ble
ˌin-di-ˈfat-i-gə-bəl
: capable of working a long time without tiring : tireless
an indefatigable teacher
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