I / impugnātor
noun

impugnātor

gen. impugnātōris · gender masculine · decl. 3rd
one who attacks; assails
one who attacks, assails (late Lat.; in Liv. 27, 15, 8, the true read. is oppugnatores), Cassiod. Var. i. q. Ambros. in Psa. 118, Serm. 13, 6.