形容詞 discreditable:

1. tending to bring discredit or disrepute; blameworthy

1. The difference between a moral man and a man of honour is that the latter regrets a discreditable act even when it has worked.
   有道德的人與君子之間的差別是，即使在干了丟臉的事情而不為人所覺察，后者也會(huì)后悔。
2. The difference between a moral man and a man of honour is that the latter regrets a discreditable act even when it has work.
   有道德的人與君子之間的差別是，即使在干了丟臉的事情而不為人所察覺，后者也會(huì)后悔的。

dis.cred.it.a.ble

adj.（形容詞）
Harmful to one`s reputation; blameworthy:
有損名譽(yù)的；可恥的：
例句：
discreditable behavior.
可恥的行為

【引伸】
discred.itably
adv.（副詞）