Synonyms of grievously

2 Syllables

quite, sadly, very, badly

3 Syllables

sorely, gravely, woefully, wistfully, cheerlessly, joylessly, harmfully

4 Syllables

distressingly, intensely, regrettably, disastrously, severely, lamentably, deplorably, acutely, distressfully, heartbrokenly, threateningly, menacingly, dolefully, morosely, perilously, precariously, decidedly

6 Syllables

unfortunately