rebate1
 
/
ˈriːbeɪt/
n.
  - a partial refund to someone who has paid too much for tax, rent, or a utility.
- a deduction or discount on a sum due.
v.
 pay back as a rebate.
Derivative
Etymology
ME: from Anglo-Norman Fr. rebatre ‘beat back’, also ‘deduct’.
rebate2
 
/
ˈriːbeɪt/
n.
 a step-shaped recess cut in a piece of wood, typically forming a match to the edge or tongue of another piece.
v.
 (rebates, rebating, rebated)
  - make a rebate in.
- join or fix with a rebate.
Etymology
C17: alt. of rabbet.