frosted (adj.)youdaoicibaDictYouDict[frosted 词源字典]
1640s, of hair, "turning white;" 1680s, of glass, "having a rough and unpolished surface;" 1734 in cookery, "covered with something (sugar, icing) resembling frost," past participle adjective from frost (v.).[frosted etymology, frosted origin, 英语词源]