earplug
ear‧plug /ˈɪəplʌɡ $ ˈɪr-/
noun [countable usually plural]
a small piece of rubber that you put inside your ear to keep out noise or water
ear‧plug /ˈɪəplʌɡ $ ˈɪr-/
noun [countable usually plural]a small piece of rubber that you put inside your ear to keep out noise or water