rue
n [U]
type of evergreen shrub with bitter leaves formerly used in medicine 芸香(常绿灌木, 叶味苦, 旧时用以入药).
rue v (pres p rueing or ruing, pt, pp rued) [Tn]
(dated or fml 旧或文) repent or regret (sth) (used esp in the expressions shown) 对(某事物)感到懊悔(尤用於以下示例)
You´ll live to rue it, ie You will regret it one day. 总有一天你得後悔.
He´s rueing the day he joined the Army! 他後悔参了军!