The Collaborative International Dictionary of English v.0.48:
Murkily \Murk"i*ly\, adv. Darkly; gloomily. [1913 Webster]WordNet (r) 3.0 (2006):
murkily adv 1: unclearly; opaquely; "murkily expressed ideas" 2: with a dim light; "a dimly lit room" [syn: dimly, murkily]