earplug
/ˈɪəplʌg/noun
(一般作earplugs)
1
- a piece of wax, rubber, or cotton wool placed in the ear as protection against noise, water, or cold air（挡声音、防水或挡冷空气的）耳塞。
2
- historical an ornament worn in the lobe of the ear〈史〉（戴在耳垂上的）耳饰。