판가름해요 · 판가름했어요 · 판가름할 거예요 · 판가름하세요
to decide, to determine (an outcome), to settle
Example
이번 경기가 우승 팀을 판가름할 거예요.
This game will decide the championship team.
Word parts
From 판 'round, match' plus 가름 'dividing' — splitting winners from losers.
Good to know
Intransitive 판가름이 나다 'to be settled' is just as common as the verb.