earplug

n. 耳栓

earful, earl, earldom, earliness, early, early and late, early closing, early or late, early warning, earmark, earn, earn one's living, earner, earnest, earnestly, earnestness, earning, earnings, earnings-related, earphone, earring, earrings, earshot, earsplitting, earth, earth science, earthen, earthenware, earthiness, earthlight, earthly, earthquake, earthwork, earthworm, earthy, earwig, ease, eased, easel, easement,