Synonyms for Mirky (same or very similar meaning)
WordNet sense 1 ((of especially liquids) clouded as with sediment):
cloudy, muddy, murky, turbidWordNet sense 2 (not clear; not transmitting or reflecting light or radiant energy):
opaqueWordNet sense 3 (protected from heat and light with shade or shadow):
shadedFrom the ODE community, based on WordNetadd/edit