I / instīgātor
noun

instīgātor

gen. instīgātōris · gender masculine · decl. 3rd
a stimulator
a stimulator, instigator (post-Aug.): sibi quisque dux et instigator, Tac. H. 1, 38: superfluus, Aus. Ep. 17 fin.: accusationis, Dig. 3, 2, 20.