슬퍼서

because (someone is) sad, being sad and

→ 슬프다
adjective Rare #31,338
because (someone is) sad, being sad and The -어서 ending connects the adjective to what follows, often giving a reason.
KO: 슬퍼서 혼자 울었어요.
EN: I cried alone because I was sad.
Forms of 슬프다
슬픈슬퍼슬퍼서

슬퍼서 웃는 것은 나의 마음이 나를 앞질러 간 거 야

Laughing because I’m sad means my heart has gotten ahead of me.

— 너의 이름은. (2016)

슬퍼서 웃는 것은 너의 마음이 너를 앞질러 간 거 야

Laughing when you're sad means your heart has gotten ahead of you.

— 너의 이름은. (2016)

슬퍼서 죽는 줄 알았어 대체 왜 그랬어?

I thought I was going to die from sadness. Why on earth did you do that?

— "폭풍의 언덕" (2026)