fail

动词 fail:

1. fail to do something; leave something undone
   同义词：neglect
2. be unsuccessful
   同义词：go wrong, miscarry
3. disappoint, prove undependable to; abandon, forsake
   同义词：betray
4. stop operating or functioning
   同义词：go bad, give way, die, give out, conk out, go, break, break down
5. be unable
6. judge unacceptable
7. fail to get a passing grade
   同义词：flunk, bomb, flush it
8. fall short in what is expected
9. become bankrupt or insolvent; fail financially and close
10. prove insufficient
    同义词：run out, give out
11. get worse

1. Several banks failed during the depression.
   有几家银行在不景气时期倒闭了。
2. He never fails to write to his mother every week.
   他从来没有忘记每周给母亲写信。
3. He got a fail in history and passes in other subjects.
   他历史考试不及格，其他科目都通过了。
4. I fail to see why you find it so amusing.
   我不明白你们为什么对这件事感到如此好笑。
5. I tried to fix the equipment but I failed.
   我想把机器修理好，但是失败了。

fail

v.（动词）
failed,fail.ing,fails
v.intr.（不及物动词）
To prove deficient or lacking; perform ineffectively or inadequately.
表现欠佳：证明不足或不够；活动受损或不充足
To be unsuccessful:
失败：不成功：
例句：
a valiant attempt that failed.
虽败犹荣

To receive an academic grade below the acceptable minimum.
不及格：达到的学术等级低于最低限度

To prove insufficient in quantity or duration; give out:
用尽：数量或持续时间证明为不足；用完：
例句：
The water supply failed during the drought.
在干旱期供水不足

To fall short, as in what is expected of one:
未达成：不能达到别人所期望的：
例句：
failed in her obligations to the family.
她对家庭没有尽到责任

To decline, as in strength or effectiveness:
减弱：力量减弱或功能衰退：
例句：
The patient`s heart failed.
病人的心跳减弱

To cease functioning properly:
彻底中止运转：
例句：
The engine failed.
引擎彻底停止了运转

To become bankrupt or insolvent:
破产：
例句：
Our family business failed in 929.
929年我们家族破产了

v.tr.（及物动词）
To disappoint or prove undependable to:
使失望或不可信赖：
例句：
Our sentries failed us.
我们的哨兵令我们失望

To abandon; forsake:
抛弃；放弃：
例句：
His strength failed him.
他丧失了力气

To omit to perform (an expected duty, for example):
遗漏未做：忽略而未能完成（例如，所期望的任务）：
例句：
.We must . . . hold . . . those horrors up to the light of justice. Otherwise we would fail our inescapable obligation to the victims of Nazism: to remember.(Anthony Lewis)
.记住：我们必须将那些惨事交付法庭审判。否则，对遭受法西斯主义迫害的人，我们将无法尽到应尽的责任.(安东尼·刘易斯)

To leave (something) undone; neglect:
疏忽：留下（某事）没做完；疏忽：
例句：
failed to wash the dishes.
忘了洗盘子

To receive an academic grade below the acceptable minimum in (a course, for example):
不及格：达到的学术等级低于能接受的最低限度（如某门课程）：
例句：
failed algebra twice.
代数两次不及格

To give such a grade of failure to (a student):
给（学生）不及格：
例句：
failed me in algebra.
给我代数不及格

n.（名词）

Failure to deliver securities to a purchaser within a specified time.
保证失信：未能在特定时间内将保证金交给买主
Failure to receive the proceeds of a transaction, as in the sale of stock or securities, by a specified date.
交割失信：在股票或抵押品售出后，未能在规定日期内办理交接手续

<习惯用语>without fail
With no chance of failure:
一定，必定：没有失败的可能：
例句：
Be here at noon without fail.
一定在正午时到这里

来源：
Middle English failen
中古英语 failen
from Old French faillir
源自 古法语 faillir
from Vulgar Latin *fallore
源自 俗拉丁语 *fallore
variant of Latin fallere [to deceive]
拉丁语 fallere的变体 [欺骗]