ruefully
🇺🇸
/ˈruːfəli/
🇬🇧
/ˈruːfəli/
in a way that shows regret or sadness
He looked at the broken vase and said ruefully, 'I guess I wasn't being careful enough.'
他看著破碎的花瓶,懊悔地說:'我想我不够小心。'