stopper (n.)youdaoicibaDictYouDict[stopper 词源字典]
late 15c., "one who obstructs," agent noun from stop (v.). From 1590s as "something that obstructs;" specific sense "glass plug for a bottle neck" is from 1660s. As a verb from 1670s. Related: Stoppered.[stopper etymology, stopper origin, 英语词源]