dark

темно имя прилагательное:

темный (dark, obscure, murky, deep, dingy, black)

черный (black, dark, sable, ebon, smutty)

мрачный (gloomy, grim, dark, bleak, dismal, somber)

смуглый (dark, swarthy, dusky, brown, black, swart)

темноволосый (dark, dark-haired, brown-haired)

угрюмый (sullen, gloomy, surly, morose, moody, dark)

тайный (secret, undercover, covert, clandestine, arcane, dark)

неясный (obscure, unclear, vague, dim, indistinct, dark)

печальный (SAD, dismal, sorrowful, mournful, deplorable, dark)

дурной (bad, ill, evil, wrong, stupid, dark)

непонятный (incomprehensible, unclear, obscure, inexplicable, weird, dark)

необразованный (uneducated, illiterate, bookless, unlettered, dark, unnurtured)

безнадежный (hopeless, desperate, black, dark, irredeemable, horizonless)

сомнительный (doubtful, dubious, questionable, uncertain, precarious, dark)

секретный (secret, classified, confidential, undercover, subterranean, dark)

нечистый (unclean, impure, dirty, wicked, drossy, dark)

наречие:

темно (dark)

имя существительное:

темнота (darkness, dark, blackness, night, obscurity, gloom)

тьма (dark, gloom, obscurity, cloud)

тень (shadow, shade, ghost, dark, loom, reflection)

потемки (dark)

неведение (ignorance, dark, nescience, non-acquaintance)

невежество (ignorance, barbarism, dark)