"forbidden area" is correct and usable in written English.
It refers to any place that is off-limits for people. For example, "Employees are not allowed to enter the forbidden area of the office."
"You are in a forbidden area.
For higher stress load the forbidden area increases.
Composing has always been an almost forbidden area for people who have no systematic music trainings.
It would be a breach of our constitution – in our system that is the forbidden area.
Like reprimanded children, the Knicks began to avoid the forbidden area -- the lane.
The following year, Gilles Villeneuve went off the track and killed two spectators, who were in a forbidden area.
However, it is possible to access forbidden areas of the internet by using proxy servers.
"There were fears that ecologists would turn this thing into a new border, create exclusion zones and forbidden areas, not to serve communism, but environmentalism," he said.
"Totally misleading" is the way Pickens describes Republican attempts to convince the public that if we just opened up all these forbidden areas to oil drilling then gas prices would fall.
He also recalled that in 1934, while he was away at Tuskegee, his mother had been one of the ringleaders in the movement to break the restrictive covenants, often by attempting to occupy apartments or houses in the forbidden areas.
Still, in the words of his one-time protégé and commune-companion, Joschka Fischer, the Green who now happens to be Germany's foreign minister, "He doesn't give a damn about anything he deems politically correct the party line, taboos, forbidden areas and so on".
