/ ˈtʃeɪsn; NAmE / verb
[ vn ] [ often passive ] ( formal ) to make sb feel sorry for sth they have done :
He felt suitably chastened and apologized.
She gave them a chastening lecture.
It was a chastening experience .
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WORD ORIGIN
early 16th cent.: from an obsolete verb chaste , from Old French chastier , from Latin castigare castigate, from castus morally pure, chaste.