indefatigable

play
adjective in·de·fat·i·ga·ble \ˌin-di-ˈfa-ti-gə-bəl\

Definition of indefatigable

  1. :  incapable of being fatigued :  untiring an indefatigable worker

indefatigability

play \ˌin-di-ˌfa-ti-gə-ˈbi-lə-tē\ noun

indefatigableness

play \ˌin-di-ˈfa-ti-gə-bəl-nəs\ noun

indefatigably

play \ˌin-di-ˈfa-ti-gə-blē\ adverb

Examples of indefatigable in a sentence

  1. a person of indefatigable patience

  2. an indefatigable laborer who can work from sunrise to sunset

Origin and Etymology of indefatigable

Middle French, from Latin indefatigabilis, from in- + defatigare to fatigue, from de- + fatigare to fatigue


First Known Use: 1608


INDEFATIGABLE Defined for English Language Learners

indefatigable

play
adjective in·de·fat·i·ga·ble \ˌin-di-ˈfa-ti-gə-bəl\

Definition of indefatigable for English Language Learners

  • : able to work or continue for a very long time without becoming tired



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