◎ 开口 kāikǒu
(1) [open one’s mouth;begin to speak;start to talk]∶张口说或笑
没等我开口,他就抢先替我说了
(2) [put the first edge on a knife]∶新刃磨、抢,使之锋利
(3) [break]∶河水冲破堤防