How do you spell Endeavor

Available Definitions:
1)  v. t. - 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.
2)  v. i. - To exert one's self; to work for a certain end.
3)  n. - An exertion of physical or intellectual strength toward the attainment of an object; a systematic or continuous attempt; an effort; a trial.