* Allowed: This is the most straightforward antonym, meaning something is permitted.
* Permitted: Similar to "allowed," this indicates something is not forbidden.
* Legal: This applies when the prohibition is due to a law.
* Authorized: This implies that something is officially sanctioned or approved.
* Acceptable: This suggests that something is socially or culturally acceptable.
* Free: This conveys the idea of being unrestricted or having no limitations.
The best antonym for "prohibited" will depend on the specific situation and the nature of the prohibition.