退避三舍 -------- retreat to avoid a conflict

例句：
A: In case not to qnarrel with your wife, yon can retreat to avoid a conflict.
为了不和妻子吵架，你可以退避三舍。
B: It is easy to say but difficult to do.
说起来容易做起来难。

同义词：
give a way to sb. to avoid a conflict

注释：
quarrel with... 和......吵架