When to use mistake in Korean
Korean: 실수[ sil-su ]

When to use it
A mistake is something wrong that you do by accident. In Korean, 실수 means a mistake in everyday actions, words, or choices. You can use it to talk about your own mistake or someone else’s, like when you say, “I made a mistake” or “It was my mistake.”
Example sentences
학교에서 큰 실수를 했어요.
I made a big mistake at school.
숙제에 실수가 하나 있어요.
There is one mistake in the homework.
미안해요. 제 실수예요.
I'm sorry. It was my mistake.
가게에서 돈을 더 내는 실수를 했어요.
I made a mistake and paid too much at the store.
여행 중에 버스를 잘못 타는 실수를 했어요.
I made a mistake and got on the wrong bus during the trip.
친구 이름을 잘못 말하는 실수를 했어요.
I made a mistake and said my friend's name wrong.