hither (adv.)youdaoicibaDictYouDict[hither 词源字典]
Old English hider, from Proto-Germanic *hideran (cognates: Old Norse heðra "here," Gothic hidre "hither"), from Germanic demonstrative base *hi- (compare he, here). Spelling change from -d- to -th- is the same evolution seen in father, etc. Relation to here is the same as that of thither to there.[hither etymology, hither origin, 英语词源]