impersuasibilis

impersuasibilis [cf. LL impersuadibilis] , not susceptible to persuasion, obstinate. genus hominum perversum ‥, tam incorrigibile quam inpersuasibile Gosc. Wulsin 15; c1104 precor ‥ ne omnino refugiatis neque impersuasibilis existatis Anselm (Ep. 345) V 283.