This is the 13097th most frequent Korean word.
동창이자
The word "동창이자" in Korean translates to "someone who is both a classmate and..."
Here, '동창이자' indicates a dual role as being both an alumni colleague and a friend.
그는 내 동창이자 친구입니다.
He is both my alumni colleague and my friend.
In this sentence, '동창이자' signifies the combined relationship of being alumni and team members.
우리는 고등학교 때 동창이자 재활용 팀원이었습니다.
We were high school alumni and recycling team members.
Here, '동창이자' is used to show the dual description of the person as an alumni and an actor.