incommunicado
In a state or condition of inability or unwillingness to communicate.
The father of a woman living in the incommunicado world of the Big Brother house in Australia has died but his daughter has not been told.
Where it comes from
Borrowed from Spanish incomunicado, with spelling influenced by such English words as communicate.
Adapted from the Wiktionary entry incommunicado (CC BY-SA 4.0).