Definition of muffles:
(v) :
(transitive) To wrap (a person, face etc.) in fabric or another covering, for warmth or protection; often with up.
(v) :
(transitive) To wrap up or cover (a source of noise) in order to deaden the sound.
(v) :
(transitive) To mute or deaden (a sound etc.).
(n) :
Anything that mutes or deadens sound.
(n) :
A warm piece of clothing for the hands.
(n) :
A kiln or furnace, often electric, with no direct flames (a muffle furnace)