Loitering is prohibited.
Yes, it is a adjective.
You can say..."Bob PROHIBITED jhonny from going to the store"...
smoking is prohibited by us
Students were prohibited from adding reactants to chemical experiments without an experienced supervisor.
You can use "disallow" in a sentence to indicate that something is not permitted or prohibited. For example, "The rules disallow outside food in the classroom."
this is a prohibited Zone. You are not allowed in this Zone.
Unauthorized access was prohibited. So we came back.
Strictly speaking, contraband is illegally imported or exported material, and so the word is not properly used in reference to a prohibited, locally-grown product.the contraband was removed from the passengers
it is not prohibited
Another word for prohibited is disallowed. Banned is also similar to prohibited.
Forbidden: Not allowed, prohibited. You use the word forbidden as follows: Farmer Jones has forbidden us from entering his vegetable patch.
It prohibited the manufacture, sale, and transportation of alcohol.