When to use fun in Korean
Korean: 재미[ jae-mi ]

When to use it
Fun means something is enjoyable and makes you feel happy. In Korean, 재미 means fun or interest in an activity, game, class, or place. You will often hear it in sentences like "It is fun" or "There is fun" when talking about everyday actions.
Example sentences
집에서 그림 그리기는 재미가 있어요.
Drawing at home is fun.
학교 수업이 재미있어요.
The class at school is fun.
공원에서 자전거를 타면 재미있어요.
Riding a bike in the park is fun.
친구와 이야기하면 재미가 있어요.
Talking with a friend is fun.
시장에서 구경하는 건 재미있어요.
Looking around at the market is fun.
여행 중에 사진 찍는 건 재미가 있어요.
Taking pictures during a trip is fun.