/ˈtʃeɪ.sən/
to make sb feel sorry for sth they have done 使内疚;使懊悔
He felt suitably chastened and apologized.
他恰当地感到内疚并表示歉意。

She gave them a chastening lecture.
她给他们做了一次令他们深感汗颜的演讲。

It was a chastening experience.
那是一次让人接受磨炼的经历。