[ào huǐ]
feel remorse; regret; be regretful; repent (of)
One can imagine how regretful he was.
可以想像他是多么懊悔。
He has nothing to repent of.
他没有什么要懊悔的。
I regretted having blamed her unjustly.
我懊悔不该错怪了她。
A person who does a regrettable action is often regretful afterwards.
行为不检点的人， 日后往往懊悔。