rectrix
From LSJ
Έγ', ὦ ταλαίπωρ', αὐτὸς ὧν χρείᾳ πάρει. Τὰ πολλὰ γάρ τοι ῥήματ' ἢ τέρψαντά τι, ἢ δυσχεράναντ', ἢ κατοικτίσαντά πως, παρέσχε φωνὴν τοῖς ἀφωνήτοις τινά –> Wretched brother, tell him what you need. A multitude of words can be pleasurable, burdensome, or they can arouse pity somehow — they give a kind of voice to the voiceless.
Latin > English (Lewis & Short)
rectrix: īcis, f. rector,
I she that leads or guides; a directress, governess, mistress (post-Aug.): animam velut aurigam rectricemque membrorum, Col. 3, 10, 9: sapientia domina rectrixque est, Sen. Ep. 85, 32: Italia rectrix parensque mundi altera, Plin. 37, 13, 77, § 201.