Another word for unfortunately
To be regretted
unluckily, regrettably, lamentably, unhappily, miserably, sadly, grievously, disastrously, dismally, calamitously, badly, dismayingly, sickeningly, discouragingly, catastrophically, horribly, if worst comes to worst.
With ill fortune
by ill hap, by chance, accidentally, predestinately, as luck would have it, by an evil chance, perversely.