Pectoralis - pectus, chest.⏎
Obturator - obturare, to occlude; obturator foramen was named because it is largely occluded by the obturator membrane.⏎
Pelvis - pelvis, basin.⏎
Piriform, piriformis - pirum, pear; forma, shape.⏎
Pudendal - pudere, to be ashamed. Genitals (pudenda) were considered shameful parts.⏎