Something that inhibits you from doing something restricts or keeps you from doing it.
Something that is prohibitive, especially in price, keeps a person from purchasing it because it is too expensive or is unaffordable.
When you exhibit something, you either put that interesting thing out for the public to see, or you yourself show a particular feeling or type of behavior.
When you prohibit someone from doing something, you keep them from doing it, often by making the action against the law.
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