汚 水(おすい)

おすい

noun

sewage; wastewater

1. sewage; wastewater; dirty water; polluted water

Water that has been contaminated by human use, including household waste, industrial discharge, or other pollutants.

汚水(おすい)が川(かわ)に流(なが)れ込(こ)んだ。

Sewage flowed into the river.

汚水(おすい)処理(しょり)は環境(かんきょう)保護(ほご)に重要(じゅうよう)だ。

Sewage treatment is important for environmental protection.

工場(こうじょう)からの汚水(おすい)が問題(もんだい)になっている。

Wastewater from the factory has become a problem.

Water contaminated by household, industrial, or other human use. A technical term often seen in news and environmental contexts.

Forms

汚(お) (dirty, polluted) + 水(すい) (water).

Common collocations

汚水(おすい)処理(しょり): sewage treatment
汚水(おすい)処理場(しょりじょう): sewage treatment plant
汚水(おすい)を流(なが)す: to discharge wastewater
汚水(おすい)が流(なが)れ込(こ)む: sewage flows in

Related words

下水(げすい): sewage, sewerage (the drainage system)
排水(はいすい): drainage, wastewater (broader term)
汚染(おせん): pollution, contamination

Related Words

Related: 下水(げすい) (sewage, drainage)

Related: 下水道(げすいどう) (sewer system)

Related: 排水(はいすい) (drainage)

Related: 汚染(おせん) (pollution, contamination)

general

Added 2026.2.3 11:58 · Revised 2026.9.2 13:01

09500/09654_osui