elinguis
From LSJ
μή μοι θεοὺς καλοῦσα βουλεύου κακῶς· πειθαρχία γάρ ἐστι τῆς εὐπραξίας μήτηρ, γυνὴ Σωτῆρος· ὦδ᾽ ἔχει λόγος → When you invoke the gods, do not be ill-advised. For Obedience is the mother of Success, wife of Salvation—as the saying goes.
Latin > English (Lewis & Short)
ē-linguis: e, adj. lingua.
I Lit., deprived of a tongue, Aus. Ep. 23, 14; Cassiod. Hist. Eccl. 6, 15.—
II Transf.
A In gen., speechless, Cic. Fl. 10, 22; Liv. 10, 19 (with mutus); id. post Red. 3, 7 (with mutus and tacitus); Gell. 5, 1, 9.—
B Pregn., without eloquence, Cic. Brut. 26, 100; Cels. praef. med.; Tac. Or. 36 fin. (opp. disertus).