incommunicado

For example, as discussed previously in this report, a person could be held 'incommunicado' indefinitely with no apparent opportunity for judicial review.

We don't kidnap people and hold them 'incommunicado' .

It seems rather suspicious that he's gone 'incommunicado' .

I expect he'll be 'incommunicado' for at least 2 weeks.

The project from the 6th circle of hell has been put to bed (for the second time in a month) and, as far as work's concerned, I'm 'incommunicado' for a week.