When to use hardship in Korean
Korean: 고생[ go-saeng ]

When to use it
고생 means hardship, trouble, or hard work. You use it when someone has a difficult or tiring time doing something. In daily Korean, people also say “고생했어요” to mean “You worked hard” or “That was tough.”
Example sentences
오늘 이사하느라 정말 고생했어요.
I really had a hard time moving today.
시험 준비하느라 고생이 많았어요.
I had a hard time preparing for the exam.
비 오는 날 밖에서 일해서 고생했어요.
It was hard because I worked outside on a rainy day.
오래 기다리게 해서 고생시켜서 미안해요.
I’m sorry for making you wait and causing you trouble.
시장까지 걸어가서 장보기가 좀 고생이었어요.
Walking to the market made shopping a bit hard.
여행 중에 길을 잃어서 고생했어요.
I had a hard time because I got lost during the trip.