muzzle

(noun) the open circular discharging end of a gun. Synonyms: gun muzzle.

(noun) forward projecting part of the head of certain animals; includes the jaws and nose.

(noun) a leather or wire restraint that fits over an animal's snout (especially a dog's nose and jaws) and prevents it from eating or biting.

(noun) restraint put into a person's mouth to prevent speaking or shouting. Synonyms: gag.

(verb) fit with a muzzle. Examples: "Muzzle the dog to prevent it from biting strangers."

(verb) prevent from speaking out. Synonyms: gag. Examples: "The press was gagged."

(verb) tie a gag around someone's mouth in order to silence them. Synonyms: gag. Examples: "The burglars gagged the home owner and tied him to a chair."