unhappily (adv.)youdaoicibaDictYouDict[unhappily 词源字典]
late 14c., "unfortunately, unluckily;" early 15c., "wretchedly, without happiness," from un- (i) "not" + happily, or from unhappy + -ly (2.). Similar formation in Old Norse unheppiliga.[unhappily etymology, unhappily origin, 英语词源]