P / perfectus
noun

perfectus

gen. perfectūs · gender masculine · decl. 4th
a finishing; perfecting; perfection; effects
a finishing or perfecting; perfection (very rare), Tert. Anim. 20.—Plur., effects, Vitr. 10, 3, 1 (in Vitr. 1, 2, 6, prospectus is the true reading).