확인이 · 확인을
confirmation, check, verification
Example
출발하기 전에 비행기 시간 확인을 꼭 하세요.
Be sure to check your flight time before you leave.
Word parts
확 certain+인 recognize
Literally 'make certain and recognize'.
Good to know
Pronounced [화긴] — the ㄱ batchim slides into the next vowel.