make certain
US /meɪk ˈsɜːr.tən/
UK /meɪk ˈsɜːr.tən/

1.
확인하다, 확실히 하다
to ensure something; to take action so that something is certain to happen
:
•
Please make certain that all windows are closed before you leave.
떠나기 전에 모든 창문이 닫혀 있는지 확인해 주세요.
•
I need to make certain I have enough money for the trip.
여행에 충분한 돈이 있는지 확인해야 해.