Synonyms of unfortunately

2 Syllables
feebly, sadly, badly
3 Syllables
grievously, faultily, ineptly, frightfully, terribly, fatally, horribly, dismally
4 Syllables
unluckily, regrettably, disastrously, lamentably, miserably, unhappily, imperfectly, erroneously, maladroitly, staggeringly, unskillfully, blunderingly, drastically, impossibly, incurably, disturbingly
5 Syllables
unsuccessfully, discouragingly, abominably, unavailingly