noun
A device placed over an animal's snout to prevent biting, barking, or eating. Commonly used for dogs.
散歩のときは犬に口輪を付けてください。
Please put a muzzle on your dog when you take it for a walk.
その犬は口輪を嫌がって外そうとした。
The dog disliked the muzzle and tried to take it off.