in-frēnātus (infraen-), a, um, adj.,
without a bridle : equites frenati et infrenati, on unbridled horses , Liv. 21, 44, 1. —Trop.: lingua, Cassiod. Hist. Eccl. 12, 4.
īn-frēnātus (1) adj.,without a bridle: equites infrenati, on unbridled horses, L. ...
An Elementary Latin Dictionary