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.
(..) Abandon ship, Mr. Sulu. Sound the alarm. Maybe in those Pods it's a chance to escape Can you lead the ship to way? The impulse engines are still trying to draw power from the warp reserve. We can not move until the SAUCER is separated. I'll handle it. Ay ay, sir. (..)2016 Star Trek Beyond