retaliate

v. 报复,报仇,回敬

If we impose import duties, other countries may retaliate against us.

我们若徵收进口税, 别的国家就可能报复我们.

He slapped his sister, who retaliated by kicking him.

他打了妹妹一巴掌, 他妹妹回敬他一脚.