ἐξαναφανδόν
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)
Adv.
A openly, ἐρέω δέ τοι ἐ. Od.20.48.
German (Pape)
[Seite 868] ganz offenbar, Od. 20, 48.