He pulled one out and slipped it over my head, zipping the mouth closed to muffle my voice.
Police theorized that her killer used the blanket to muffle the sound of the gunshots.
The sheets did little to muffle the carnal soundtrack emanating from inside.
early 15c., "to cover or wrap (something) to conceal or protect," perhaps from Middle French mofler "to stuff," from Old French moufle "thick glove, muff" (cf. Old French enmoufle "wrapped up"); see muff (n.). Meaning "wrap something up to deaden sound" first recorded 1761. Related: Muffled; muffling.
"thing that muffles," 1560s, from muffle (v.).