"duskiest" in the adjective sense
1. dusky, twilight, twilit
lighted by or as if by twilight
"The dusky night rides down the sky/And ushers in the morn"-Henry Fielding
"the twilight glow of the sky"
"a boat on a twilit river"
2. dark-skinned, dusky, swart, swarthy
naturally having skin of a dark color
"a dark-skinned beauty"
"gold earrings gleamed against her dusky cheeks"
"a smile on his swarthy face"
"`swart' is archaic"
Source: WordNet® (An amazing lexical database of English)
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