discretionary

形容词 discretionary:

1. having or using the ability to act or decide according to your own discretion or judgment
   同义词：discretional
2. (especially of funds) not earmarked; available for use as needed

1. The first items crossed off shopping lists were discretionary items- furniture, some clothing and other extras that are the bread and butter of many large stores.
   首先从采购单上删除的，是一些可有可无的项目——家具、服装以及其他额外物品，这些都是很多大商店赖维持营业的商品。

dis.cre.tion.ar.y

adj.（形容词）
Left to or regulated by one`s own discretion or judgment.
自由决定的：按自己的行动或判断的决定或调节的
Available for use as needed or desired:
可随意使用的：可按需要或要求使用：
例句：
a discretionary fund.
自由支配的资金

【引伸】
discre.tionar.ily