quagmire
noun
[ ˈkwaɡmʌɪə ]
• a soft boggy area of land that gives way underfoot.
• "torrential rain turned the building site into a quagmire"
Similar:
swamp,
morass,
bog,
peat bog,
marsh,
mire,
quag,
marshland,
fen,
slough,
quicksand,
moss,
corcass,
bayou,
pocosin,
moor,
marish,
carr,
Origin:
late 16th century: from quag + mire.