P / pernĭo
noun

pernĭo

gen. pernōnis · gender masculine · decl. 3rd
a kibe on the foot; a chilblain
a kibe on the foot, a chilblain, Plin. 23, 3, 37, § 74; 23, 6, 58, § 109; 28, 16, 62, § 221.