후회스러워요 · 후회스러웠어요 · 후회스러운 (+noun) (ㅂ irregular)
regrettable, full of regret
Example
그때 부모님 말씀을 듣지 않은 게 정말 후회스러워요.
I really regret not listening to my parents back then.
Word parts
후 after+회 regret
Literally 'regret afterward' + -스럽다 'feeling like'.
Good to know
후회스럽다 describes a feeling (the thing is regrettable); 후회하다 is the action verb with an object.
Related words