How to say "sludge" in Japanese

• ヘドロCommon
  nounCovers foul, polluted sludge that accumulates at the bottom of bays, rivers, or harbors. It carries a strongly negative image of stinking, contaminated ooze in the natural environment, as in a polluted waterfront.
• 汚泥おでいCommon
  nounCovers sludge as dregs or mire, especially the dirty sediment produced by water or sewage treatment. It is the technical term used in industrial and environmental-engineering contexts, such as a treatment plant.

Use 「ヘドロ」 for foul, polluted sludge in natural settings like bays and rivers, and 汚泥 for sludge in technical or industrial contexts such as sewage treatment.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• へどろsludge
• 汚泥おでいsludge
• スラッジsludge
• 軟泥なんでいsludge
• 沈渣ちんさsediment
• セジメントsediment
• 底質ていしつbottom material
• ぬかるみmuddy place
• 沈殿物ちんでんぶつsediment