短语 “muddy the waters（把水搅浑）” 的实际意思是 “搞乱某个状况，使事情或问题变得更复杂或不清楚”。

例句
In trying to fix the problem, Roy's advice just muddied the waters.
本想解决问题，但罗伊的建议反倒把事情越搞越乱。

Having two managers working on the project just muddied the waters – we only need one person to take charge.
让两名经理来参与这个项目，只会越搞越乱 —— 我们只需要一个人来负责。

We need to focus on this task so please don't bring in other issues to muddy the waters.
我们得专注做这项任务，所以请不要引入其它问题来搅乱现状。