muzzle

nouns

the open circular discharging end of a gun
forward projecting part of the head of certain animals; includes the jaws and nose
is a part of
the upper part of the human body or the front part of the body in animals; contains the face and brains
"he stuck his head out the window"
is a type of (narrower)
the part of an animal corresponding to the human face
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
is a type of (narrower)
a device that retards something's motion
"the car did not have proper restraints fitted"
restraint put into a person's mouth to prevent speaking or shouting

verbs

fit with a muzzle
"muzzle the dog to prevent it from biting strangers"
antonym
is derived from
is a type of (narrower)
provide with (something) usually for a specific purpose
"The expedition was equipped with proper clothing, food, and other necessities"
prevent from speaking out
"The press was gagged"
tie a gag around someone's mouth in order to silence them
"The burglars gagged the home owner and tied him to a chair"