pitfall

English Thesaurus

1. a trap in the form of a concealed hole (noun.artifact)

hypernym	:	trap,
definition	:	a device in which something (usually an animal) can be caught and penned (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)