MORASS
mire, quagmire, quag, morass, slack
(noun) a soft wet area of low-lying land that sinks underfoot
Source: WordNet® 3.1
Etymology
Noun
morass (plural morasses)
A tract of soft, wet ground; a marsh; a fen.
(figurative) Anything that entraps or makes progress difficult.
Source: Wiktionary
Mo*rass", n. Etym: [OE. marras, mareis (perh. through D. moeras), fr.
F. marais, prob. from L. mare sea, in LL., any body of water; but
perh. influenced by some German word. See Mere a lake, and cf.
Marsh.]
Definition: A tract of soft, wet ground; a marsh; a fen. Morass ore. (Min.)
See Bog ore, under Bog.
Source: Webster’s Unabridged Dictionary 1913 Edition