What does prohibited mean in social studies

Prohibited means to prevent. You aren't allowed to is what it means. In short, when you are forbidden to do something.

Basically a type of restriction.

Ghana, first of the great medieval trading empires of western africa (fl. 7th–13th century). it was situated between the sahara and the headwaters of the sénégal and niger rivers, in an area that now comprises southeastern mauritania and part of mali.