βαγαρόν
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
English (LSJ)
χλιαρόν (Lacon.), Hsch. βαγεῖ· εἰσελθοῦσαι, Id. βάγιον· μέγα, Id., Suid.
