[{"Bold_text": "noun", "List Items": ["(in mountaineering) the act or method of moving down a steep incline or past an overhang by means of a double rope secured above and placed around the body, usually under the left thigh and over the right shoulder, and paid out gradually in the descent."]}, {"Bold_text": "verb (used without object)", "List Items": ["to descend by means of a rappel."]}]