F / frēnātor
noun

frēnātor

gen. frēnātōris · gender masculine · decl. 3rd
a curber; tamer; controller
a curber, tamer, controller (post-Aug.).
Lit.: (sol) ignipedum frenator equorum, Stat. Th. 1, 27.— Poet. transf.: ingentis frenator Sarmata conti, i. e. a hurler, Val. Fl. 6, 162.—
figuratively
Trop.: infinitae potestatis domitor ac frenator animus, Plin. Pan. 55, 9.