stultiloquium
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
Latin > English
stultiloquium stultiloquii N N :: silly/foolish/stupid talk; babbling
Latin > English (Lewis & Short)
stultĭlŏquĭum: ii, n. id.,
I silly talk, babbling, stultiloquy, Plaut. Mil. 2, 3, 25; Hier. Eph. 5, 3; Vulg. Eph. 5, 4.
Latin > German (Georges)
stultiloquium, iī, n. (stulte u. loquor) = μωρολογία (Gloss. II, 374, 49), das einfältige Gerede, Gewäsch, Plaut. mil. 296. Vulg. Ephes. 5, 4 u.a. Eccl.