What is a suffix for prohibit?

There isn't a common suffix specifically for "prohibit". The word itself is already a verb, and it's usually used directly in a sentence.

However, you can use other words related to "prohibit" with suffixes:

* Prohibition: This noun form uses the suffix "-ion" to indicate the act of prohibiting.

* Prohibitive: This adjective uses the suffix "-ive" to describe something that is extremely expensive or difficult, making it practically impossible.

* Prohibitor: This noun uses the suffix "-or" to refer to a person or thing that prohibits something.

You could also use prohibit with prefixes like un-, in-, dis-, or pre- to modify its meaning.