quick·sand /ˈkwɪkˌsænd/
  流沙,流沙地,危險狀態
  Quick·sand n. 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.
     Life hath quicksands, -- Life hath snares!   --Longfellow.
  ◄ ►
  quicksand
       n 1: a treacherous situation that tends to entrap and destroy
       2: a pit filled with loose wet sand into which objects are
          sucked down