Rebate
/ɹəˈbeɪt/
noun
A deduction from an amount that is paid; an abatement.
The return of part of an amount already paid.
The edge of a roll of film, from which no image can be developed.
verb
To deduct or return an amount from a bill or payment
To diminish or lessen something
To beat to obtuseness; to deprive of keenness; to blunt; to turn back the point of, as a lance used for exercise.