endeavor : Idioms & Phrases
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."
Webster 1913
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."