[{"Bold_text": "noun", "List Items": ["a musical instrument resembling an accordion but having buttonlike keys, hexagonal bellows and ends, and a more limited range.", "concertina wire concertina wire."]}, {"Bold_text": "verb (used without object)", "List Items": ["to fold, crush together, or collapse in the manner of a concertina:The car concertinaed when it hit the truck."]}, {"Bold_text": "verb (used with object)", "List Items": ["to cause to fold or collapse in the manner of a concertina."]}, {"Bold_text": "adjective", "List Items": ["of, relating to, or resembling a concertina:concertina pleats."]}]