The Collaborative International Dictionary of English v.0.48:
Mirky \Mirk"y\, a. Dark; gloomy. See Murky. [1913 Webster]WordNet (r) 3.0 (2006):
mirky adj 1: (of liquids) clouded as with sediment; "a cloudy liquid"; "muddy coffee"; "murky waters" [syn: cloudy, muddy, mirky, murky, turbid] 2: dark or gloomy; "a murky dungeon"; "murky rooms lit by smoke- blackened lamps" [syn: murky, mirky]