sightyoudaoicibaDictYouDict
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
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.