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

Recent Examples of indefatigable from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'indefatigable'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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

Definition of indefatigable for English Language Learners

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



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