must tell, have to let know, must inform
무슨 일 인지 알려야 할 거 아녜요!
Shouldn't you tell me what's going on?
— 알.이.씨 (2007)
누군가는 아내 에게 알려야 했다.
Someone had to tell his wife.
꼭 유서 같아서 경찰에 알려야 했는데…
It seemed so much like a suicide note that I had to alert the police…
— 헤어질 결심 (2022)