endeavorv. t.[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.] 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.()It is our duty to endeavor the recovery of these beneficial subjects. (Ld. Chatham.)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.()v. i. To exert one's self; to work for a certain end.()And such were praised who but endeavored well. (Pope.)()()n.[Written also endeavour.] An exertion of physical or intellectual strength toward the attainment of an object; a systematic or continuous attempt; an effort; a trial.()To employ all my endeavor to obey you. (Sir P. Sidney.)To do one's endeavor, to do one's duty; to put forth strenuous efforts to attain an object; -- a phrase derived from the Middle English phrase to do one's dever (duty). Mr. Prynne proceeded to show he had done endeavor to prepare his answer. Fuller.()()