unhistorical (adj.)youdaoicibaDictYouDict[unhistorical 词源字典]
1610s, "not in accordance with history, not being a part of recorded history," from un- (1) "not" + historical. Unhistoric in this sense is from 1801. Related: Unhistorically.[unhistorical etymology, unhistorical origin, 英语词源]