When to use rainbow in Korean
Korean: 무지개[ mu-ji-gae ]

When to use it
A rainbow (무지개) is a colorful arc you can sometimes see in the sky after rain. People use this word when talking about weather, nature, and colors. You can say you saw a rainbow, took a picture of it, or drew one.
Example sentences
비가 그친 후에 무지개가 떴어요.
A rainbow appeared after the rain stopped.
창문 밖에 큰 무지개가 보여요.
I can see a big rainbow outside the window.
학교에서 무지개를 그렸어요.
I drew a rainbow at school.
친구가 "저기 무지개 봐!"라고 말했어요.
My friend said, "Look at that rainbow!"
아이가 무지개 우산을 사고 싶어 해요.
The child wants to buy a rainbow umbrella.
여행 중에 산 위에서 무지개를 봤어요.
I saw a rainbow over the mountains during the trip.