When to use sleep in Korean
Korean: 잠[ jam ]

When to use it
잠 means sleep. It is the rest your body gets at night or during a nap. In Korean, people use this word (잠) when talking about sleeping, feeling sleepy, or not getting enough rest.
Example sentences
저는 밤 열 시에 잠을 자요.
I sleep at ten at night.
아기가 지금 잠을 자고 있어요.
The baby is sleeping now.
수업 시간에 잠이 와요.
I feel sleepy during class.
어제 잠을 많이 못 잤어요.
I could not sleep much yesterday.
버스에서 잠깐 잠이 들었어요.
I fell asleep for a moment on the bus.
여행 전날에는 잠이 잘 안 와요.
I cannot sleep well the night before a trip.