in·com·mu·ni·ca·do 
(
ĭn
′k
ə-my
′n
ĭ-kä
d
ō)
adv. & adj. Without the means or right of communicating with others: a prisoner held incommunicado; incommunicado political detainees.
[Spanish incomunicado, past participle of incomunicar, to deny communication : in-, not (from Latin; see IN-1) + comunicar, to communicate (from Latin commūnicāre; see COMMUNICATE).]