Yap.Town

힘든 거

that it's hard

→ 힘들다
phrase Common #6,038
that it's hard 거 is a conversational form of 것, used here to turn 힘들다 (“to be hard”) into “that it's hard.”
KO: 네가 요즘 힘든 거 알아.
EN: I know things have been hard for you lately.