When to use to decrease in Korean
Korean: 줄다[ jul-da ]

When to use it
The word "to decrease" means that something becomes smaller or less. In Korean, (줄다) is used when the number, amount, size, or level goes down. You can use it for things like rain, people, homework, prices, or time.
Example sentences
비가 많이 줄었어요.
The rain decreased a lot.
우리 반 학생 수가 줄었어요.
The number of students in our class decreased.
냉장고에 우유가 줄었어요.
The milk in the fridge decreased.
오늘 숙제가 좀 줄었어요.
Today, the homework decreased a little.
이 가게는 손님이 줄었어요.
This store has fewer customers.
휴가 시간이 줄어서 아쉬워요.
I’m sad because my vacation time decreased.