暗黒

(1) 啓発、知識、または文化がないさま(lacking enlightenment or knowledge or culture; "this benighted country"; "benighted ages of barbarism and superstition"; "the dark ages"; "a dark age in the history of education")(lacking enlightenment or knowledge or culture)

⇒教育の歴史の暗黒時代(lacking enlightenment or knowledge or culture)

(2) ほとんど望みを与えないさま(offering little or no hope; "the future looked black"; "prospects were bleak"; "Life in the Aran Islands has always been bleak and difficult"- J.M.Synge; "took a dim view of things")(offering little or no hope)

⇒もの事を懐疑的に見た(offering little or no hope)

(3) 光または明るさが欠けている、または、光または明るさが不十分な陰になる、または黒い(devoid of or deficient in light or brightness; shadowed or black; "sitting in a dark corner"; "a dark day"; "dark shadows"; "dark as the inside of a black cat")(devoid of or deficient in light or brightness)(shadowed or black)

⇒黒猫の内側のように暗い(shadowed or black)

(4) 落胆を引き起こす(causing dejection; "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather")(causing dejection)

⇒厳しい雨の天気(causing dejection)