She spoke in a tone of voice that she usually 'reserved' for her students. [=that she usually only used for her students]
I will 'reserve judgment' [=will not make a judgment/decision] until I know the full story.
We 'reserve' the right to make further changes to the agreement if necessary.
(..) Why the hell didn't you tell me so? - Because there's still some things left to do. - Like what? - The reserve power system's blown... - That's a bunch of horseshit. - We can take off without that. - Yeah, we can. You think that's a good idea? Look, I just wanna get (..)1979 Alien