1.
muddy swamp, bog
A literal swamp or marsh filled with deep mud.
2.
quagmire, morass, hopeless situation
A situation that is difficult to escape from and keeps getting worse, like being stuck in mud.
Usage
Sense 2 is more common in everyday usage. The figurative meaning emphasizes a situation that worsens the more you struggle, mirroring the experience of sinking deeper into actual mud. Often used with 化する (泥沼化) to describe something becoming a quagmire.
Common collocations
Related Words
Compare:
沼地 (swamp)