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.

FORMATION:
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 TERMS:

  • 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
general
Added 2026.2.3 11:58 · Revised 2026.3.25 14:40
09500/09654_osui