booby trap

English Thesaurus

1. an explosive mine hidden underground; explodes when stepped on or driven over (noun.artifact)

hypernym	:	mine,
definition	:	explosive device that explodes on contact; designed to destroy vehicles or ships or to kill or maim personnel (noun.artifact)

hyponym	:	bouncing betty,
definition	:	an antipersonnel land mine (noun.artifact)

hyponym	:	claymore, claymore mine,
definition	:	an antipersonnel land mine whose blast is aimed at the oncoming enemy (noun.artifact)

2. an unforeseen or unexpected or surprising difficulty (noun.cognition)

hypernym	:	difficulty,
definition	:	a factor causing trouble in achieving a positive result or tending to produce a negative result (noun.cognition)