muzzle/ 'm^zl /

1.noun [c] 
(restraint) (for dog) 口套

2.noun [of dog] 
(nose and mouth) 鼻口部分

3.noun [of gun] 
枪口

4.vt.[+dog] 
给…套口套

5.vt.[+press] [ person] 
(gag) 使缄默