discount/'dɪskaʊnt/

n. a reduction in the usual price

n. [C] 折扣：Students can buy books at a discount in this bookstore. 学生在这个书店买书可以打折。

◇[a discount of 5/10 percent] They give you a discount of 10 percent（= a 10 percent discount）if you buy more than two pairs. 如果你买两双以上，他们给你打九折。

构词dis- + count

用法discount指的是一定比例不算入总价。与汉语中的“…折”刚好相反。