When to use preparation in Korean
Korean: 대비[ dae-bi ]

When to use it
"Preparation" means getting ready before something happens. In Korean, 대비 is used when you prepare in advance for a situation, like rain, winter, a test, or a trip. You can often see it in phrases like "for preparation" or "prepare for something" (대비).
Example sentences
비에 대비해 우산을 챙겼어요.
I packed an umbrella to prepare for rain.
시험 대비로 오늘 집에서 공부해요.
I am studying at home today to prepare for the test.
겨울 대비로 두꺼운 옷을 샀어요.
I bought thick clothes to prepare for winter.
여행 대비로 여권을 다시 봤어요.
I checked my passport again to prepare for the trip.
정전에 대비해 손전등을 준비했어요.
I prepared a flashlight in case of a power outage.
소풍 대비로 물과 간식을 넣었어요.
I packed water and snacks to prepare for the picnic.