She spoke in a tone of voice that she usually 'reserved' for her students. [=that she usually only used for her students]
She usually 'reserved' her best dishes for very important dinners.
This table is 'reserved' for someone else.
(..) - Probably. It is amusing as they pass those sew in certain moments. I have loved that woman for a lot of time. She has always been very reserved. We have been together... in silence... And when we picked up you yesterday, it was no longer so silent, he/she wanted to speak of it. (..)2007 Into the Wild