I / infractĭo
noun

infractĭo

gen. infractōnis · gender feminine · decl. 3rd
a breaking to pieces
a breaking to pieces, Prisc. 1282 P.—
a weakening figuratively
Trop., a weakening: infractio et demissio animi, despondency, Cic. Tusc. 3, 7, 14.