The Collaborative International Dictionary of English v.0.48:
Harshly \Harsh"ly\, adv. In a harsh manner; gratingly; roughly; rudely. [1913 Webster] 'T will sound harshly in her ears. --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
harshly adv 1: in a harsh or unkind manner; "`That's enough!,' he cut in harshly" 2: in a harsh and grating manner; "her voice fell gratingly on our ears" [syn: gratingly, raspingly, harshly]