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   sludge

   /slʌdʒ/

   noun

   • 1. thick, soft, wet mud or a similar viscous mixture of liquid and solid components, especially the product of an industrial or refining process: "the dumping of sewage sludge"
   • ▪ dirty oil, especially in the sump of an internal combustion engine.
   • 2. an unattractive muddy shade of brown or green: "a sludge green"
   • 3. sea ice newly formed in small pieces.

   Word Origin early 17th century: of uncertain origin; compare with slush.

   Derivatives

   • 1. sludgy adjective

   Scrabble Points: 8

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