ὦμμαι

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

Source

French (Bailly abrégé)

pf. Pass. de ὁράω, v. ὅσσομαι.

Greek Monotonic

ὦμμαι: Παθ. παρακ. του ὁράω.

Russian (Dvoretsky)

ὦμμαι: pf. pass. к ὁράω.