porphyry

n [U] type of hard red rock which contains red and white crystals, and may be polished and made into ornaments 斑岩（色红、 坚硬, 可制装饰品）.

porcelain, porch, porcine, porcupine, pore, pork, pork pie, pork-barrel, pork-butcher, pork-pie hat, porker, porn, porno, pornographer, pornographic, pornographically, pornography, porosity, porous, porousness, porosity, porpoise, porpoise(title), porridge, port, port of call, portability, portable, portage, portal, portal vein, portcullis, portend, portent, portentous, portentously, porter, porter's lodge, porterage, porterhouse steak, portfolio,