expultrix
From LSJ
ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
Latin > English (Lewis & Short)
expultrix: īcis, f. expello,
I she that drives out or expels: philosophia, expultrix vitiorum, Cic. Tusc. 5, 2, 5.