obviously, plainly, clearly
그런 사람이 있다는 건 뻔히 알 수 있었지만.
It was obvious that someone like that existed, though.
사람을 앞에 놓고 뻔히 구라를 쳐
They blatantly lie to your face.
— The Chaser (2008)
뻔히 알고 받은 거 예요
I knew exactly what I was getting when I accepted it.
— 보리밭을 흔드는 바람 (2006)