muzzle

The projecting part of an animal's face, including the nose and mouth.

"The dog's muzzle was wet and cold."

To put a muzzle on an animal to prevent it from biting.

"You must muzzle the dog before the walk."

A device placed over an animal's mouth to prevent it from biting.

"He put a muzzle on the aggressive dog."

To prevent a person or group from expressing opinions freely.

"The government tried to muzzle the press."