idiotismus
From LSJ
ἐγὼ δὲ λέγω ὑμῖν ὅτι πᾶς ὁ βλέπων γυναῖκα πρὸς τὸ ἐπιθυμῆσαι αὐτὴν ἤδη ἐμοίχευσεν αὐτὴν ἐν τῇ καρδίᾳ αὐτοῦ → But I am telling you that anyone who looks at a woman to the extent of lusting after her has already committed adultery with her in his heart (Matthew 5:28)
Latin > English (Lewis & Short)
ĭdĭōtismus: i, m., = ἰδιωτισμός,
I the common or vulgar manner of speaking, Sen. Contr. 3 praef. § 5; 2, 11 fin.
Latin > French (Gaffiot 2016)
ĭdĭōtismus ou -os, ī, m. (ἰδιωτισμός), expression propre à une langue, idiotisme : Sen. Rhet. Contr. 2, 3, 21.