失败的英文：
be defeated
lose

参考例句：

go [ run,tread ] awry
出差错;失败

The underlying reason for the failure remains unknown.
失败的根本原因尚未搞清。

Make or break
促使..的成功或失败

Make it or break it; succeed or fail
完全成功或失败

To entertain (some) apprehensions of failure
深惧失败

Suffer pain,torture,defeat
遭受痛苦、折磨、失败

The party was a fiasco.
那次聚会完全失败了。

A rot sets in.
突然一蹶不振而连连失败。

A post-mortem on the election defeat
对选举失败的事后剖析.

He was unmanned by his failure in business.
他因生意上的失败而气馁

defeated是什么意思：
v. 击败；使困惑；使失败，阻挠，挫败
n. 失败；击败，战胜

Victory of defeat
不成功,便失败

Their defeat was not inevitable.
他们被击败是不是不可避免的。

sting of defeat
失败的痛苦

The team refused to resign themselves to defeat/to being defeated.
该队不甘失败.

They were defeated all hollow.
他们被彻底打垮了。

lose是什么意思：
v. 遗失；输掉；浪费；被...夺去；不明白；逃避；错过

to lose; to miss; to disappear; to mislay
遗失

A tale never loses in the telling.
故事总是被人们说得添枝加叶的。

Merry is he that has nought to lose
人无所失,不亦乐乎

She is on a diet to lose a stone.
她在节食以减少一英石的体重。

To cause to droop or lose freshness.
使软垂，使枯萎，使调谢。