动 answer，reply，treat，cope with；副 mutually，face to face，divide into halves；形 opposite，opposing，right，correct；名 （对偶的词句； 对联） antithetical couplet，couplet

[例句] 别抱怨不好的事，要对好的事心存感恩。 Instead of complaining about what's wrong, be grateful for what's right.

[例句] 他因为对一位同事动粗而被开除了。 He was fired from his job after roughing up a colleague.