形容詞 dishonourable:

1. lacking honor or integrity; deserving dishonor
   同義詞：dishonorable
2. not adhering to ethical or moral principles
   同義詞：base, dishonorable, immoral, unethical
3. morally unacceptable
   同義詞：dishonorable

1. The officer was reduced in rank for dishonourable action.
   那個軍官由于不光彩的行徑而被降職。
2. He is ashamed for his former dishonourable action.
   他對他以前不光彩的行為感到羞愧。
3. He has done many dishonourable things these years
   這些年，他干了許多可恥的事情。