Lewis & Short

effĕrĭtas (ecf-), ātis, f. [efferus], an excessively wild state, wildness, degeneracy (opp. mansuetudo), Cic. Sest. 42, 91: quas (terras) peragrans undique omnem ecferitatem expuli, id. Tusc. Poet. 2, 8, 20 fin. (al. feritatem); Lact. Mort. Pers. 9, 2.