"darker" in the adjective sense
1. dark
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"
2. dark
used of color) having a dark hue
"dark green"
"dark glasses"
"dark colors like wine red or navy blue"
3. dark
brunet (used of hair or skin or eyes
"dark eyes"
4. black, dark, sinister
stemming from evil characteristics or forces wicked or dishonorable
"black deeds"
"a black lie"
"his black heart has concocted yet another black deed"
"Darth Vader of the dark side"
"a dark purpose"
"dark undercurrents of ethnic hostility"
"the scheme of some sinister intelligence bent on punishing him"-Thomas Hardy
5. dark
secret
"keep it dark"
6. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen
showing a brooding ill humor
"a dark scowl"
"the proverbially dour New England Puritan"
"a glum, hopeless shrug"
"he sat in moody silence"
"a morose and unsociable manner"
"a saturnine, almost misanthropic young genius"- Bruce Bliven
"a sour temper"
"a sullen crowd"
7. benighted, dark
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"
8. dark, obscure
marked by difficulty of style or expression
"much that was dark is now quite clear to me"
"those who do not appreciate Kafka's work say his style is obscure"
9. blue, dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary
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"
10. dark
not giving performances closed
"the theater is dark on Mondays"
Source: WordNet® (An amazing lexical database of English)
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