kitten (n.)youdaoicibaDictYouDict[kitten 词源字典]
late 14c., probably from an Anglo-French variant of Old French chitoun (Old North French caton) "little cat," from chat "cat," from Late Latin cattus (see cat). Applied playfully to a young girl, a sweetheart, from 1870.[kitten etymology, kitten origin, 英语词源]