A / admissor
noun

admissor

gen. admissōris · gender masculine · decl. 3rd
one that allows himself to do a thing; a perpetrator
one that allows himself to do a thing, a perpetrator (late Lat.), Lact. Epit. 63; Aug. Cic. Div.Civ. Dei 7, 3; cf. admitto, II. C.