muzzle

prevent from speaking out

tie a gag around someone's mouth in order to silence them

the open circular discharging end of a gun

restraint put into a person's mouth to prevent speaking or shouting

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

fit with a muzzle

“muzzle the dog to prevent it from biting strangers”

forward projecting part of the head of certain animals; includes the jaws and nose