praemostro
From LSJ
ἔκβαλε πρῶτον ἐκ τοῦ ὀφθαλμοῦ σοῦ τὴν δοκόν, καὶ τότε διαβλέψεις ἐκβαλεῖν τὸ κάρφος ἐκ τοῦ ὀφθαλμοῦ τοῦ ἀδελφοῦ σου → first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother's eye
Latin > English (Lewis & Short)
praemostro: old form of praemonstro, Plaut. Trin. 341.
Latin > French (Gaffiot 2016)
præmostrō, āre, c. præmonstro : Pl. *Trin. 342.