anarrhinon
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 (Lewis & Short)
ănarrhīnon: v. antirrhinon.
Latin > French (Gaffiot 2016)
ănarrhīnŏn, ī, n. (ἀνάρρινον), muflier [plante] : Plin. 25, 129 ; v. antirrhinon.