which: [OE] Etymologically, which means ‘what like, of what form or sort?’ The word was formed in the prehistoric Germanic period from the interrogative base *khwa-, *khwe- (source of English what, who, etc) and *līka- ‘body, form’ (source of English like and also incorporated into English each and such). Its Germanic relatives include German welch and Dutch welk ‘which’. => like[which etymology, which origin, 英语词源]