封口

fēngkǒu

(1) [seal]∶封闭张开之处

(2) [heal]∶伤口闭合

(3) [say sth.definitive so as to prevent further discussion]∶把话说死, 不再改变

(4) [sealing-off]∶白炽灯泡抽真空口的最终封焊