pachyderm

n. 厚皮动物，厚脸皮的人

oxygen tent, oxygenate, oxymoron, oyez, oyster, oyster bed, oyster-catcher, oz, ozone, ozone layer, P, P and O, p and p, P, p, p.a. system, p.m., P.M./p.m., pa, pace, pacemaker, pacific, pacifically, pacification, pacifier, pacifism, pacifist, pacify, pack, pack it in, pack sb off, pack sth in, pack sth in; pack sth in/into sth, pack sth out, pack up, pack-animal, pack-ice, pack-saddle, pack...into, package, package holiday, package tour,