Lewis & Short

frēnātor, ōris, m. [freno], a curber, tamer, controller (post-Aug.).

  1. I. Lit.: (sol) ignipedum frenator equorum, Stat. Th. 1, 27.
    Poet. transf.: ingentis frenator Sarmata conti, i. e. a hurler, Val. Fl. 6, 162.
  2. II. Trop.: infinitae potestatis domitor ac frenator animus, Plin. Pan. 55, 9.