Counteract - coun·ter·act - verb （动词）

• act against (something) in order to reduce its force or neutralize it. 以抵消某事和中和某事为目的行为。同义词有：Prevent（防御).

Countermeasure  - coun·ter·meas·ure - noun （名词）

• an action taken to counteract a danger or threat. 防御危险和威胁的行动。

例句：

• Do you know a countermeasure to counteract a venomous snake? 你知道对付毒蛇的方法吗？