When to use to lose in Korean
Korean: 잃어버리다[ il-eo-beo-ri-da ]

When to use it
잃어버리다 means “to lose” something, like your key, phone, or bag. Use it when you had something before, but now you cannot find it. People use this word in many everyday situations, such as at home, at school, while shopping, or during travel.
Example sentences
집에서 리모컨을 잃어버렸어요.
I lost the remote control at home.
학교에서 연필을 잃어버렸어요.
I lost my pencil at school.
공원에서 모자를 잃어버렸어요.
I lost my hat at the park.
엄마, 가방을 잃어버렸어요.
Mom, I lost my bag.
가게에서 영수증을 잃어버렸어요.
I lost the receipt at the store.
여행 중에 여권을 잃어버렸어요.
I lost my passport during the trip.