quagmire

quagmire
/ˈkwægmaɪə(r), also kwɔg-; `kwægˌmaɪr, kwɑɡ-/ n
area of soft wet ground; bog or marsh 泥沼; 泥塘; 沼泽
    (fig 比喻) The heavy rain had turned the pitch into a quagmire. 大雨滂沱, 球场变成了泥沼.

牛津英汉双解词典