When to use cushion in Korean
Korean: 방석[ bang-seok ]

When to use it
A cushion is a soft pad that you sit on or lean on for comfort. In Korean, 방석 usually means a seat cushion that you put on a chair or the floor. People use it at home, at school, or outside when they want a softer place to sit.
Example sentences
의자에 방석을 놓았어요.
I put a cushion on the chair.
이 방석은 정말 푹신해요.
This cushion is very soft.
교실 바닥에 방석을 깔고 앉아요.
We put a cushion on the classroom floor and sit down.
공원에 갈 때 방석을 가져가요.
I take a cushion when I go to the park.
엄마가 새 방석을 샀어요.
Mom bought a new cushion.
기차에서 작은 방석을 베고 잤어요.
I slept on the train using a small cushion.