What is another word for "obscure"?

Roget's Thesaurus (1911) lists these synonyms for "obscure": ambiguity, atramentous, behind, black, blackamoor, blacken, blackness, blind, blot, blotch, blush, born, buck, call, charcoal, chiaroscuro, coal, coal-black, color, conceal, concealed, concealment, coon, covered, covert, crabbed, crow, curtain, dark, darken, darkness, delitescence, delitescent, denigrate, derogatory, dim, dingy, dusky, dye, ebon.