sightyoudaoicibaDictYouDict[sight 词源字典]
sight: [OE] Sight is a derivative of the prehistoric Germanic base *sekh-, which also produced English see. In the case of its Germanic relatives, German gesicht, Dutch gezicht, Swedish ansikte, and Danish ansigt, the notion of ‘sight’ has led on via ‘appearance’ to ‘face’.
=> see[sight etymology, sight origin, 英语词源]
unseen (adj.)youdaoicibaDictYouDict
early 13c., from un- (1) "not" + seen. Similar formation in Old English ungesewen, Middle Dutch ongesien, Dutch ongezien, Old High German ungesëhan, German ungesehen, Old Norse usenn.