I am told, however, that its only use is to prevent it from ever being used.

They did this to prevent these papers from being used against them.

Preventing her from using it even to save my life.

It could even prevent him from using his own voice in commercial situations.

Sometimes things come up that prevent us from using our tickets.

And access control is desirable in order to prevent others from using the back door.

High river levels can prevent vessels from using this section.

I for one, want to prevent them from ever using that information against me or letting others get at it either.

They simply prevent others from using that which would otherwise be useful.

Golden's job is to know what the rebels are up to, and to prevent them from using violence.