morass
Morass (noun) means an area of soft, waterlogged land; a marsh or a fen.
Etymology
Comes from Dutch moeras (“marsh, swamp”), an alteration, influenced by Dutch moer (“moor”), of a direct descendant of Middle Dutch marasch (“marsh”). That Middle Dutch word was borrowed from Old French mareis, which came from Proto-West Germanic *marisk. It is a doublet of marish and marsh, and is linked in part to moor. Compare quagmire.