(superl.) Dark; obscure; gloomy.

ambiguous amorphous amphibological besmirched black blackened bleak blind blotchy caliginous clear as mud clouded cloudy dark dark-colored darkened darkish darksome dim dimmish dimpsy dingy dirty discolored dismal double-edged double-faced drab dreary dun dusk dusky equivocal filthy foggy foul foxed foxy fuliginous funereal fuzzy glooming gloomy glowering grey grim grimy grubby hazy indeterminate indistinct inky lowering misty mucky muddy murk murksome nasty nebulous nubilous obscure opaque overcast roily semidark shadowy shady shapeless sibylline smirched smoky smudgy smutty soiled somber sooty sordid squalid stained stigmatic stigmatiferous stigmatized subfusc tainted tarnished tenebrous threatening transcendent turbid unclean unclear unplain vague