The term 'refuse to allow' can be expressed in four different ways: BAN, VETO, FORBID, and NIX. Banning something means to officially prohibit it, while vetoing is the act of rejecting or disallowing something. Forbidding is similar to banning, but it is more of a warning or caution against doing something. Lastly, nixing something is to reject or cancel it. All four terms mean to not allow something, and they are often used interchangeably.