I . a.
1.
Unilluminated, unenlightened, dusky shadowy, rayless, sunless, ~some, lurid, murky, cloudy, shady, overcast, black, ebon, Cimmerian, pitchy.
2.
Mysterious, obscure, incomprehensible, unintelligible, enigmatical, mystic, mystical, recondite, occult, transcendental, abstruse, cabalistic.
3.
Gloomy, disheartening, discouraging, cheerless, dismal.
4.
Untaught, ignorant, unlettered, rude, ~ened, benighted.
5.
Wicked, atrocious, infamous, foul, nefarious, flagitious, horrible, damnable, vile, infernal.
II . n.
1.
Darkness, obscurity, want of light.
2.
Concealment, secrecy, privacy.
3.
Ignorance, blindness, want of knowledge.