ear-muff n

(usu pl 通常作复数) either of a pair of ear-coverings connected by a band across the top of the head, and worn to protect the ears, esp from the cold （尤指防寒用的）耳罩: a pair of green ear-muffs 一副绿色的耳罩.

E, E number, E, e, E-mail, e. g., e.g., ea, each, each other, eager, eagerly, eagerness, eagle, eagle eye, eagle-eyed, eaglet, ear, ear-ache, ear-drop, ear-drum, ear-plug, ear-ring, ear-splitting, ear-trumpet, earache, earful, earl, earldom, earliness, early, early and late, early closing, early or late, early warning, earmark, earn, earn one's living, earner, earnest, earnestly,