countermeasure

1. N-COUNT A countermeasure is an action that you take in order to weaken the effect of another action or a situation, or to make it harmless. 對策; 對抗措施

Because the threat never developed, we didn't need to take any real countermeasures. 由於這個威脇從未顯現，我們也就沒有必須採取任何真正的對策。