1.
swamp, marsh
An area of low-lying, waterlogged land.
この沼には魚がたくさんいる。
There are many fish in this marsh.
沼地を歩く。
To walk through marshland.
沼の周りを散歩する。
To walk around the marsh.
沼に住む鳥。
Birds that live in swamps.
沼で蓮が咲いている。
Lotus flowers are blooming in the marsh.
2.
bog, quagmire
Wet muddy ground that is difficult to cross.
沼に足を取られた。
My foot got stuck in the swamp.
泥沼にはまった。
I got stuck in the quagmire.
泥沼の争い。
A quagmire of conflict.
借金の沼にはまる。
To fall into a quagmire of debt.
趣味の沼にはまる。
To fall deep into a hobby (slang).
沼 refers to a swamp or marsh—wetland with standing water.
COMMON COMPOUNDS:
- 沼地: marshland, swamp area
- 泥沼: quagmire, muddy swamp
- 底なし沼: bottomless swamp
FIGURATIVE USAGE:
沼 and 泥沼 are used figuratively for situations difficult to escape:
- 泥沼の争い: a quagmire of conflict
- 借金の沼にはまる: to fall into a debt trap
SLANG:
In modern internet/otaku culture, 〜沼 or 沼にはまる means becoming deeply obsessed with a hobby, fandom, or interest—similar to "falling down a rabbit hole" or "getting hooked."