the projecting part of the face, including the nose and mouth, of an animal such as a dog or horse
（犬、马等动物的）鼻口部；吻。
a guard, typically made of straps or wire, fitted over this part of an animal's face to stop it biting or feeding
（动物的）口套。
〈非正式〉 （人的）鼻、口、颏部分。
the open end of the barrel of a firearm
枪口；炮口
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Devlin jammed the muzzle of the gun into the man's neck .德夫林将枪口紧紧抵住那人的脖子。
put a muzzle on (an animal)
给（动物）上口套。
〈喻〉 使（人，机构，尤指新闻机构）缄默；钳制… 的言论
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the politicians want to muzzle us and control what we write .政客们想钳制我们的言论并控制我们写的东西。
"late Middle English： from Old French
