αὐγήεις
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)
εσσα, εν, A bright-eyed, clear-sighted, Nic.Th.34.
Greek (Liddell-Scott)
αὐγήεις: εσσα, εν, ὁ, ὀξυδερκής, Νικ. Θ. 34.
Spanish (DGE)
-εσσα, -εν
de ojos brillantes ὠκύν τε καὶ αὐγήεντα τίθησι Nic.Th.34.