形容詞 discretionary:

1. having or using the ability to act or decide according to your own discretion or judgment
   同義詞：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.
   首先從采購單上刪除的，是一些可有可無的項目——家具、服裝以及其他額外物品，這些都是很多大商店賴維持營業(yè)的商品。

dis.cre.tion.ar.y

adj.（形容詞）
Left to or regulated by one`s own discretion or judgment.
自由決定的：按自己的行動或判斷的決定或調節(jié)的
Available for use as needed or desired:
可隨意使用的：可按需要或要求使用：
例句：
a discretionary fund.
自由支配的資金

【引伸】
discre.tionar.ily