废弃的英文：
discard

参考例句：

We should supersede outdated regulations and customs.
我们应该废弃陈规旧习。

This word is now obsolescent.
这个字现在已废弃不用了。

disposable paper bags have been developed
一种用后即可废弃的纸袋被设计出来了。

The couple of temples were maintained and visited from time to time. But basically they just turned their back on it.
一些庙宇还得到维护并不时有人来看一看，但基本上皇室已经废弃了吴哥。

An oBsolete word
一个废弃的词

A state of disuse or inactivity.
废弃闲置的状态

This rule has sink into disuse.
这条原则渐被废弃了。

The good ones are used and defective ones are discarded.
合格的就采用，次品就废弃。

This is a disused railway line.
这是一条废弃的铁路线。

Waste liquid;swill.
废液废弃的液体;馊水

discard是什么意思：
v.
1.[T]丢弃，抛弃
2.[T,I]垫（牌），打出（无用的牌）
n.
被抛弃的人（或物），（尤指）垫出的牌

The next player discarded a club.
下一个牌手打出一张梅花。

In this case the fractional part is discarded.
在此情况下小数部分被丢掉了。

We will discard the old books.
我们将不再使用这些旧书。

The equipment is used in beating, discarding.
该设备用于果蔬类物料的打浆、去渣。

He was discarded as an illegitimate child.
他被当作私生子抛弃了。