This is the 5266th most frequent Portuguese word.
proibida
Forbidden.
In this sentence, 'proibida' is used as an adjective describing 'entrada' (the entrance) to indicate that access is forbidden under certain conditions.
A entrada é proibida para menores de 18 anos.
The entrance is forbidden for minors under 18 years old.
Here, 'proibida' is part of a passive construction describing that an action (selling) cannot be performed after a specified time due to regulations.
A venda de bebidas alcoólicas está proibida após as 22h.
The sale of alcoholic beverages is prohibited after 10 PM.
In this instance, 'proibida' modifies 'prática' (practice) within a formal structure stating that certain activities are not allowed at the given location.