incommunicado

adj, adv

• ① (人)与外界的通信或联系断绝的[地]
  • He was held incommunicado in prison for a month.他在狱中被断绝与外界的联系达一个月。

• ② (囚犯等)被监禁的[地]
  • (be) kept incommunicado被监禁