piton

n (sport 体) metal spike or peg, with a ring at one end to hold a rope, that is hammered into a rock or a crack between rocks to support a rope or climber （登山者用的）钢锥（顶端有环可穿绳索）.

pitchblende, pitched, pitcher, pitchfork, piteous, piteously, piteousness, pitfall, pith, pith hat (also `pith helmet), pithily, pithiness, pithy, pitiable, pitiably, pitiful, pitifully, pitiless, pitilessly, pitilessness, Pitot tube, pitta, pittance, pitter-patter, Pittsburgh, pituitary, pity, pityingly, pivot, pivotal, pixel, pixie (also pixy), pizza, pizzicato, Pk, pkg, pkt, Pl, pl of vertex., placard,