Hypertext Webster Gateway: "quicksand"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Quicksand \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.
From WordNet (r) 1.7 (wn)
quicksand
n : a pit filled with loose wet sand into which heavy objects
sink
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