큰 사고

a big mistake

→ 크다
phrase Rare #32,188
a big mistake Often used with 치다 to mean causing serious trouble or making a major mistake; it can also literally mean a major accident.
KO: 이번에는 큰 사고를 치지 마.
EN: Don’t make a big mistake this time.

큰 사고 칠 뻔했잖아

You almost caused a serious accident!

— 거울 (1975)