This is the 6308th most frequent Korean word.
심장을
"심장을" is the accusative form of the noun "심장," meaning "heart" (the organ).
심장을 here symbolizes the emotional center of empathy and feeling.
그의 위대한 희생은 나의 심장을 깊이 울렸다.
His great sacrifice deeply moved my heart.
심장을 is used here to describe a physical reaction to intense emotion experienced while watching the film.
재난 영화의 장면들이 너무 강렬해서 심장을 두근거리게 만들었다.
The scenes of the disaster movie were so intense that they made my heart pound.
심장을 is used here to indicate the subject's emotional heart, metaphorically referring to her feelings.