incommunicado

incommunicado
    adj 1: without the means or right to communicate; "a prisoner
           held incommunicado"; "incommunicado political detainees"
    

35 Moby Thesaurus words for "incommunicado":
      abstruse, beclouded, blind, buried, close, clouded, concealed,
      covered, covert, eclipsed, hid, hidden, in a cloud, in a fog,
      in eclipse, in purdah, in the wings, latent, mysterious,
      obfuscated, obscure, obscured, occult, recondite, secluded,
      secluse, secret, sequestered, under an eclipse, under cover,
      under house arrest, under wraps, underground, unknown,
      wrapped in clouds