保留

retain ownership/title (to)

retain one's citizenship

retain one's position in the civil service

retain/keep one's previous salary

Let's table the bill for later discussion.

reserve one's opinion; be reticent of one's opinion; have one's reservations (about)

express certain reservations (about)

I agree with qualifications.

I can say, without any qualification, that he is trully trustworthy.

The library will keep the book for you till the weekend.

reserved capital

have some reservations; with certain/some reservations; with qualifications

have no reservations whatsoever; without a single reservation; without any reservation; without any qualification

reserve a seat

maintain/retain/reserve one's rights (to)

keep/have the negative