holdback  
noun [ C ] (also hold-back) uk/ˈhəʊld.bæk/ us/ˈhoʊld.bæk/
  (MONEY)      
  回扣
part of an amount of money that is not paid in a particular situation
  The invoice price does not reflect the holdback, a discount the dealer gets from the manufacturer.  发票价格并不反映回扣,即经销商从制造商那里得到的折扣。 
 - More examples
 - Fiscally conservative lawmakers believe the 13 percent increase in spending is to blame for today's budget holdbacks.
 - The holdback policy is designed to ensure property owners have enough money to make storm repairs but save the agency from overpaying on claims.
 - $265,000 was deposited into a construction holdback account.
 - The statute creates a scheme of payments and holdbacks as the project proceeds. These holdbacks accumulate and become a fund which is then a source of recovery in the event that someone is not paid.
 
  (OBJECT)      
 (阻止某物关上或跌落的)扣件
an object designed to hold something such as a curtain in place, so it does not close or fall
  Curtain holdbacks are fitted on the wall beside the headboard. 窗帘扣安装在床头板旁边的墙上。 
 - More examples
 - Shutters should be attached with hinges and should have holdbacks fixed at the bottom.
 - Another alternative is to drape fabric back over specially designed hold-back hooks in brass or chrome.