clouded

bedimmed, befogged, blackened, darkened, darksome, dim, dimmed, dulled, dusky, misty, murky, obscure, obscured, overshadowed

sunless

black, bleak, cheerless, dark, desolate, dismal, drear, dreary, funereal, gloomy, glum, gray (also grey), sepulchral, somber (or sombre), sullen

overcast, rainy, stormy, thick

dirty, miry, mucky, muddy, slimy, slushy, turbid

miasmal, miasmatic, miasmic

smoky (also smokey), smudgy, sooty

filmy, milky, opaque

adumbrated, blotted out, concealed, eclipsed, hid, obliterated, screened, shaded

camouflaged, cloaked, covered, curtained, disguised, masked, veiled

complicated, perplexed, sophisticated

entangled, snarled, tangled

disarranged, disarrayed, discomposed, disheveled (or dishevelled), disordered, disrupted, disturbed, jumbled, messed (up), mixed (up), muddled, scrambled, shuffled, tousled, upset