quag

名词 quag:

1. a soft wet area of low-lying land that sinks underfoot
   同义词：mire, quagmire, morass, slack

quag

n.（名词）
A quagmire.
泥塘、沼泽地

来源：
Perhaps variant of Middle English quabbe
可能为 中古英语 quabbe的变体
from Old English *cwabba
源自 古英语 *cwabba