failed

动词 fail:

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

形容词 failed:

1. unable to meet financial obligations
   同义词：failing

1. If it had not been for his help, I should have failed.
   如果没有他的帮忙，我应该已经失败。
2. But for your advice, I should have failed.
   要不是你的忠告，我会失败的。
3. Blood can be cleaned by osmosis if the kidneys have failed.
   若肾功能衰退，可通过渗透作用使血液净化。
4. The government's repression of the strike failed.
   政府对这次罢工的镇压失败了。
5. His speech failed in proof.
   他的演讲缺乏证据。
6. Their business has failed and is in the hands of the receiver.
   他们的公司垮了，现在由破产管理人管理。
7. The business faltered and then failed.
   商行生意衰退，最后倒闭了。
8. I tried to fix the equipment but I failed.
   我想把机器修理好，但是失败了。

failed

adj.（形容词）
Having undergone failure:
不成熟的：
例句：
new economic policies intended to replace the failed ones of a past administration.
新的经济政策将取代上届中央政府不成熟的经济政策