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
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
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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
Cite this Entry
“Indefatigable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indefatigable. Accessed 5 Jul. 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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