What is the antonym for word let?

The antonym for "let" depends on the context of how it's used. Here are a few possibilities:

* If "let" means "allow" or "permit", its antonym could be "forbid", "prohibit", "prevent", or "stop".

* If "let" means "release" or "free", its antonym could be "hold", "retain", or "capture".

* If "let" is used in the phrase "let go", its antonym could be "hold on".

* If "let" means "say", its antonym could be "keep silent".

To give you the most precise antonym, please provide me with the sentence where "let" is used.