sludge[noun]Synonyms: sediment, mire, muck, mud, ooze, residue, silt, slime
[TahlilGaran] English Synonym Dictionary ▲
sludge /slʌdʒ/
noun [uncountable][
Date: 1600-1700;
Origin: Probably from slush]
1. soft thick mud, especially at the bottom of a liquid
2. the solid substance that is left when industrial waste or
sewage (=the liquid waste from toilets) has been cleaned
3. thick dirty oil in an engine
—sludgy adjective [TahlilGaran] Dictionary of Contemporary English ▲