regrettably Synonyms

alas unluckily unfortunately to my shame distressfully distressingly disastrously disappointingly cheerlessly regretfully mournfully lamentably dolefully grievously ruefully i'm ashamed to say sad to relate unsuccessfully unhappily tragically regrettable sad to say pitiably painfully sorrowfully severely inauspiciously sorry dreadfully dismally deplorably deplorable badly albeit alack adversely additionally horribly however miserably terribly wretchedly woefully unfortunate sorely shame sadly regretted regret acutely