The Collaborative International Dictionary of English v.0.48:
Wickedly \Wick"ed*ly\, adv. In a wicked manner; in a manner, or with motives and designs, contrary to the divine law or the law of morality; viciously; corruptly; immorally. [1913 Webster] I have sinned, and I have done wickedly. --2 Sam. xxiv. 17. [1913 Webster]WordNet (r) 3.0 (2006):
wickedly adv 1: in a wicked evil manner; "act wickedly"; "grin evilly" [syn: wickedly, evilly]