ADJ-GRADED
后悔的;懊悔的;遺憾的
If someone is rueful, they feel or express regret or sorrow in a quiet and gentle way.
例句
He shook his head and gave me a rueful smile...
他搖了搖頭，遺憾地對我笑了笑。
'Our marriage was a mistake,' she said, looking rueful.
“我們的婚姻是個錯誤，”她說著，看起來懊悔不已。