위험해서

because it's dangerous, so it's dangerous

→ 위험하다
위험 danger, risk + 해서 do; perform
adjective Rare #18,953
because it's dangerous, so it's dangerous This is the connective form of 위험하다, used to give a reason or link to what follows.
KO: 길이 위험해서 택시를 탔어요.
EN: The road was dangerous, so I took a taxi.
Forms of 위험하다

위험해서 연락 못 했어요

I couldn't contact you because it was dangerous.

— 허공에의 질주 (1988)

위험해서 그래

Because it's dangerous.

— 음식남녀 (1994)

위험해서 안 돼

No, it's too dangerous.

— 아메리카의 밤 (1973)

위험해서 어떡해, 이거?

What are we going to do? This is dangerous!

— 헤어질 결심 (2022)