quicksand

English Thesaurus

1. a pit filled with loose wet sand into which objects are sucked down (noun.object)

hypernym	:	cavity, pit,
definition	:	a sizeable hole (usually in the ground) (noun.object)

substance holonym	:	sand,
definition	:	a loose material consisting of grains of rock or coral (noun.substance)

2. a treacherous situation that tends to entrap and destroy (noun.state)

hypernym	:	situation,
definition	:	a complex or critical or unusual difficulty (noun.state)