sludge etymology

Etymology:

• Middle English: slough or slud, of Scandinavian origin; compare with Old Norse and Icelandic slóð "ditch, slough, marsh" and Old Swedish slōdh "mud, dirt"
• Proto-Germanic: *sludaz, of unknown origin

Meaning:

• A thick, wet, and slimy mass
• A semi-liquid substance consisting of organic matter suspended in water
• Waste material from industrial or sewage treatment processes

Origin:

The word "sludge" is of Scandinavian origin and has been used in English since the early 14th century. It initially referred to a ditch or marsh, but gradually came to be associated with wet and muddy substances. By the 16th century, it was being used to refer to the sediment and waste products of industrial and sewage treatment processes.

sludge relate terms

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• apology

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• stamp

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