dark, dense, dim, dismal, dull, foggy, gloomy, misty, muddy, murky, opaque, overcast, blurred, confused, dusky, emulsified, heavy, indefinite, indistinct, leaden, lowering, mucky, mushy, nebulous, nontranslucent, nontransparent, not clear, nubilous, obscure, somber, sullen, sunless, vaporous