Synonyms of harshly

2 Syllables
grimly, firmly, curtly
3 Syllables
sassily, snootily, tactlessly, rudely, brutally, cumbrously, gruelingly, gratingly
4 Syllables
uncivilly, ungraciously, powerfully, unwieldily, discourteously
5 Syllables
cumbersomely, oppressively, restrictively, tyrannically, disrespectfully