건 알아

know that

→ 것+은
phrase Rare #19,470
know that Often used to acknowledge or confirm a fact; the subject is usually understood from context.
KO: 네가 바쁜 건 알아.
EN: I know that you're busy.

네 계급이 낮은 건 알아?

Do you realize your rank is low?

— 마사안 (2015)

미친 소리 인 건 알아.

I know it sounds crazy.

— 주토피아 2 (2025)