The protruding part of an animal's head which includes the nose, mouth and jaws; the snout

The mouth or the end for entrance or discharge of a gun, pistol etc., that the bullet emerges from as opposed to the breech.

A device used to prevent animal from biting or eating, which is worn on its snout.

To bind or confine an animal's mouth by putting a muzzle, as to prevent it from eating or biting.

To restrain (from speaking, expressing opinion or acting); gag, silence, censor.

To veil, mask, muffle.