決
けつ · ketsu · JLPT N1 · noun
decision
🗳️ 決 = water 氵 + break-through 夬: a decision breaks through doubt, like a dam giving way.
夬 means to cut through or part something. With the water radical, it suggests a dam bursting open, so deciding is breaking through doubt. The vote sense follows: a group reaches a決 by breaking the deadlock.