First Known Use: 1608
Dictionary
indefatigable
adjective in·de·fat·i·ga·ble \ˌin-di-ˈfa-ti-gə-bəl\
: able to work or continue for a very long time without becoming tired
Full Definition of INDEFATIGABLE
: incapable of being fatigued : untiring <an indefatigable worker>
— in·de·fa·ti·ga·bil·i·ty \-ˌfa-ti-gə-ˈbi-lə-tē\ noun
— in·de·fat·i·ga·ble·ness \-ˈfa-ti-gə-bəl-nəs\ noun
— in·de·fat·i·ga·bly \-blē\ adverb
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Origin of INDEFATIGABLE
Middle French, from Latin indefatigabilis, from in- + defatigare to fatigue, from de- + fatigare to fatigue
Related to INDEFATIGABLE
- Synonyms
- tireless, inexhaustible, unflagging, untiring, weariless
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