TALK TO SB#if you are incommunicado, you are in a place where other people cannot speak to you 不得与他人接触地[的]
He is reportedly being held incommunicado at a military prison.
据说他现在被单独囚禁在军事监狱。
Examples from the Corpus
held incommunicado• When Findlay arrived at the police station the superintendent ordered that he be held incommunicado.• They were reportedly arrested without warrant several days after the demonstrations, held incommunicado and tortured in garde à vue detention.• After he had been held incommunicado for a month his family were allowed to visit him and found him in good health.• The prisoners have been held incommunicado for eighteen years.
Originincommunicado
(1800-1900)Spanishincomunicado, past participle of incomunicar“to make it impossible to communicate”