[1] : The Collaborative International Dictionary of English v.0.48

endeavor \endeav"or\, v. t. imp.  p. p. endeavored; p. pr.
    vb. n. endeavoring. oe. endevor; pref. en- + dever,
   devoir, duty, f. devoir: cf. f. se mettre en devoir de faire
   quelque chose to try to do a thing, to go about it. see
   devoir, debt. written also endeavour.
   to exert physical or intellectual strength for the attainment
   of; to use efforts to effect; to strive to achieve or reach;
   to try; to attempt.
   1913 webster

         it is our duty to endeavor the recovery of these
         beneficial subjects.                     --ld. chatham.
   1913 webster

   to endeavor one's self, to exert one's self strenuously to
      the fulfillment of a duty. obs. "a just man that
      endeavoreth himself to leave all wickedness." --latimer.
      1913 webster
see also:
endeavored endeavoring devoir debt endeavour to endeavor one's self 

Endeavored >> E Words
Endeavored, definition of term: Endeavored
endeavored_pag1.html