pentagonal

adj having five sides 五边形的; 五角形的.

pennon, pennorth, Pennsylvania, penny, penny farthing, penny whistle, penny-pincher, pennyweight, pennyworth, penology, pension, pensionable, pensioner, pensive, pensively, pensiveness, pent up, pent-up, penta-, pentagon, pentameter, Pentateuch, pentathlon, Pentecost, pentecostal, penthouse, penultimate, penumbra, penurious, penuriously, penuriousness, penury, peon, peony, people, pep, pep pill, pep talk, pepper, pepper-and-salt,