A / aggressus
noun

aggressus

gen. aggressūs · gender masculine · decl. 4th
(), , aggredior. *
An attack; assault
An attack, assault (cf. aggredior, II. B.), Dig. 36, 1, 17.—
An entering upon; beginning;
An entering upon, beginning; opp. exitus (cf. aggredior, II. C.), Firm. Math. 2, 10.