smooth something over
phrasal verb with smooth verb uk/smuːð/ us/smuːð/
（通常通过交谈沟通的方式）缓和，调解
to make problems, difficulties, or disagreements less serious or easier to solve, usually by talking to the people involved
Would you like me to try to smooth things over between you and your parents? 需要我来尝试缓和一下你和你父母之间的关系吗？