[{"Bold_text": "verb (used without object)", "List Items": ["to exert oneself to do or effect something; make an effort; strive:We must constantly endeavor if we are to succeed."]}, {"Bold_text": "verb (used with object)", "List Items": ["to attempt; try:He endeavors to keep things neat in his apartment.", "Archaic.to attempt to achieve or gain."]}, {"Bold_text": "noun", "List Items": ["a strenuous effort; attempt."]}]