-거든
because (giving a reason)
TOPIK 3Gives a reason the listener didn't know: 'because ~ (you see)'.
Examples
-
그들은 네가 아니라 톰을 원하는 거거든!
They don't want you. They want Tom.
Source: Tatoeba #3681014 -
그는 왕자병 말기 환자야. 어딜 가든지 간에 타인을 수준 미달이라고 생각하거든.
He suffers from a chronically exaggerated opinion of himself. Wherever he goes, he thinks no one can hold a candle to him.
Source: Tatoeba #8398325