He showed great decision-making during the crisis, acting swiftly and confidently.

decision-making 是由名词 decision（决定）和动名词 making（做、进行）组成的复合名词。decision 来自动词 decide（决定），making 来自动词 make（做、进行）。 decision-making 指“做决定的过程或能力”，即“决策”。