1) Bitingly 2) Cruelly 3) Inconsiderately 4) Malevolently 5) Maliciously 6) Nastily 7) Spitefully 8) Unkind 9) Unpleasantly 1) Brutally 2) Callously 3) Cruelly 4) Harshly 5) Heartlessly 6) Lacking in sympathy 7) Maliciously 8) Meanly 9) Nastily 10) Pitilessly 11) Ruthlessly 12) Spitefully 13) Unkind 14) Unsympathetic 15) Viciously 
• (a.) Unfavorable; annoying; malignant. • (a.) Not kindly; unkind; ungracious. • (a.) Unnatural; contrary to nature.
[adj] - lacking in sympathy and kindness 2. [adv] - in an unkind manner or with unkindness
unsympathetic adjective lacking in sympathy and kindness; `unkindly ancts`