dark and dirty or difficult to see through

The river was brown and murky after the storm. 暴风雨过后，河水变成了褐色，浑浊不清。

used to describe a situation that is complicated and unpleasant, and about which many facts are not clear

He became involved in the murky world of international drug-dealing. 他卷入了阴暗复杂的跨国贩毒生意中。

I don't want to get into the murky waters of family arguments. 我不想趟家庭纠纷这道浑水。