[{"Bold_text": "verb (used with object)", "List Items": ["to insert or receive, as into a sheath; sheathe.", "to fold or draw (a tubular organ) back within itself; intussuscept."]}, {"Bold_text": "verb (used without object)", "List Items": ["to become invaginated; undergo invagination .", "to form a pocket by turning in."]}, {"Bold_text": "adjective", "List Items": ["folded or turned back upon itself.", "sheathed ."]}]