I / impīgrĭtĭa
noun

impīgrĭtĭa

gen. impī^grĭtiae · gender feminine · decl. 1st
activity; indefatigableness; persistency
activity, indefatigableness, persistency, Ambros. de Noë, 2, 3; id. de Jacob. 2, 2, 8: impigritas pro impigritia, Non. 125, 20.