in ‧ com ‧ mu ‧ ni ‧ ca ‧ do /ˌɪnkəmjuːnɪˈkɑːdəʊ $ -doʊ/ BrE AmE adverb , adjective
[ Date: 1800-1900 ; Language: Spanish ; Origin: incomunicado , past participle of incomunicar 'to make it impossible to communicate' ]
if you are incommunicado, you are in a place where other people cannot speak to you:
He is reportedly being held incommunicado at a military prison.