foulness/faʊlˈnɛs/EtymologyFrom Middle English foulnesse, foulnes, from Old English fūlnes (“foulness”), equivalent to foul + -ness. Compare Dutch vuilnis (“rubbish; garbage; trash”).foulness means an island on the east coast of Essex where the Thames estuary joins the North Sea. Lexicurio rates it Rare gem — a strength score of 73 out of 100.foulness is pronounced /faʊlˈnɛs/.nameAn island on the east coast of Essex where the Thames estuary joins the North Sea.A civil parish (served by Foulness Island Parish Council) in Rochford district, Essex.nounThe state of being foul.