Synonyms of indefatigable

indefatigable

adjective

ˌin-di-ˈfa-ti-gə-bəl 

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

• meticulous
• tireless
• relentless
• untiring
• unflagging
• conscientious
• inexhaustible
• vigorous
• active
• energetic
• diligent
• intense
• steadfast
• persistent
• assiduous
• spirited
• busy
• tenacious
• sedulous
• steady
• unrelenting
• determined
• stubborn
• painstaking
• unremitting
• unfailing
• weariless
• dogged
• unflinching
• unfaltering
• industrious
• pertinacious
• patient
• hard
• unabated
• dynamic
• unwavering
• plodding
• feverish
• persevering
• strenuous
• laborious
• slavish

Antonyms & Near Antonyms

• sluggish
• lazy
• indolent
• lackadaisical
• listless
• slothful
• shiftless
• laggard
• desultory
• casual
• spiritless
• languid
• apathetic
• overworked
• broken
• beat
• drained
• jaded
• overtaxed
• wearied
• spent
• sapped
• enervated
• done in
• burnt-out
• worn-out
• burned-out
• played out
• tuckered (out)

Examples of indefatigable in a Sentence

Recent Examples on the Web

There are strong rumors swirling around out there that the indefatigable McKellen will make an appearance in director Shawn Levy’s eagerly awaited Marvel summer blockbuster Deadpool & Wolverine starring Ryan Reynolds and Hugh Jackman, opening in theaters on July 26. —Baz Bamigboye, Deadline, 4 July 2024

Conservatives must be indefatigable in preserving a spirit of appreciation for the sacrifices of our nation’s heroes. —John Hatzis, National Review, 13 Sep. 2024

That raised the stakes for the 1964-1965 New York fair — as Robert Moses, its indefatigable organizer well knew. —Ruth D. Nelson / Made By History, TIME, 13 Sep. 2024

Bad As Me album about the autumn of life that speaks to the 91-year-old country icon’s legendarily indefatigable spirit and boundless energy well into his six decade as a performer. —Gil Kaufman, Billboard, 15 Aug. 2024