A swarthy person.
Tawny, dusky, dark.
Dark-skinned; Black.
Weathered, rough.
A dark grey color.
Evil, malicious.
Darker-skinned than white, but lighter-skinned than tawny; tan.
A black person.
A difficult, abstract problem that worsens as one attempts to handle it; a "sticky" situation, especially one where attempts to make it better only make it worse.