Ключевые слова: abstract, aloof, ambiguous, anonymity, background, camouflaged, clandestine, cloaked, concealment, covert, deceptive, disguise, elusive, enigmatic, enshrouded, faceless, furtive, ghost, halloween, hidden, impenetrable, incognito, inscrutable, insidious, intrigue, intriguing, mask, masque, mystery, mystifying, obscured, outdoor, person, secretive, shadowy, shrouded, skeleton, skull, sly, subterfuge, surreptitious, undercover, unknown, unrecognizable, veiled, zombies,