quicksand

noun

1. a treacherous situation that tends to entrap and destroy

   noun.state

   Source: WordNet 3.0

2. a pit filled with loose wet sand into which objects are sucked down

   noun.object

   Source: WordNet 3.0

3. Sand easily moved or readily yielding to pressure; especially, a deep mass of loose or moving sand mixed with water, sometimes found at the mouth of a river or along some coasts, and very dangerous, from the difficulty of extricating a person who begins sinking into it.

   noun

   Source: webster1913