What is another word for "hidden"?

Roget's Thesaurus (1911) lists these synonyms for "hidden": abditory, adytum, ambuscade, ambush, and, back, background, behind, blend, blind, blinker, blush, born, cloak, closet, cloud, conceal, concealed, concealment, cover, covered, covert, crypt, curtain, danger, dark, deceive, delitescence, delitescent, dim, disguise, domino, drawer, dress, eclipse, escape, faint, flower, focus, for.