v.
  - wrap or cover for warmth.
- wrap or cover (a source of sound) to reduce its loudness. ▸make (a sound) quieter or less distinct. 
n.
 a receptacle in a furnace or kiln in which things can be heated without contact with combustion products.
Etymology
  ME (as v.): perh. a shortening of OFr. enmoufler; the noun (C17) from OFr. moufle ‘thick glove’.