pitfall

n. 陷阱，未料到的危险或困难

piston ring, piston-engined, pit, pit pony, pit-a-pat, pit-a-pat (also pitter-patter), pit-head, pit-prop, pitch, pitch-and-toss, pitch-black, pitch-dark, pitch-pine, pitchblende, pitched, pitcher, pitchfork, piteous, piteously, piteousness, pith, pith hat (also `pith helmet), pithily, pithiness, pithy, pitiable, pitiably, pitiful, pitifully, pitiless, pitilessly, pitilessness, piton, Pitot tube, pitta, pittance, pitter-patter, Pittsburgh, pituitary, pity,