To refuse permission, or to not allow something
turn away phrase
to refuse to let someone come into a place
forbid verb
to state that something is not allowed, according to a rule, law, or custom
decline verb
to say politely that you will not accept something or do something
prohibit verb
to officially stop something from being done, especially by making it illegal
ban verb
to say officially that someone is not allowed to do something
bar verb
to officially say that something must not happen, or that someone must not do something or go somewhere
clamp down phrase
to make a determined attempt to stop people doing something bad or illegal
not brook something verb
to definitely not allow or accept something
refuse verb
to not give someone what they ask for, or to not let someone do what they ask to do
deny verb
to not allow someone to have something
disallow verb
to say officially that something cannot be accepted because it is illegal or not allowed by the rules