This is the 12227th most frequent German word.
verbotene
"Verbotene" means "forbidden" or "prohibited" in English.
'Verbotene' modifies 'Handlung', expressing that this action is not allowed.
Das Betreten des Grundstücks ist verbotene Handlung.
Entering the property is a forbidden action.
In this case, 'verbotene' describes 'Zone', indicating it is restricted or not permitted.
Die verbotene Zone war deutlich markiert.
The forbidden zone was clearly marked.
Here, 'verbotene' is used as an adjective meaning 'forbidden', describing the type of relationship.