pit-prop

n prop used to support the roof of a part of a coal-mine from which coal has been removed （煤矿的）坑木, 支柱.

piratically, pirouette, Pisa, piscatorial, Piscean, Pisces, piss, pissed, pistachio, piste, pistil, pistol, piston, piston ring, piston-engined, pit, pit pony, pit-a-pat, pit-a-pat (also pitter-patter), pit-head, pitch, pitch-and-toss, pitch-black, pitch-dark, pitch-pine, pitchblende, pitched, pitcher, pitchfork, piteous, piteously, piteousness, pitfall, pith, pith hat (also `pith helmet), pithily, pithiness, pithy, pitiable, pitiably,