rue·ful /ˈruːfəl/ adjectiveadj REGRET/FEEL SORRYfeeling or showing that you wish you had not done something 后悔的，悔恨的 —ruefully adverbadv He smiled ruefully. 他懊悔地笑了笑。
rueful• Then she pulled a rueful face.• Celia and Brassard, who had overheard everything from the outer office, exchanged rueful glances.• Jane looked at her with a rueful smile.