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
ὀνοζύγιον, τὸ (Α)
όνος που χρησιμοποιείται για ζεύξη.
[ΕΤΥΜΟΛ. < ὄνος + ζυγός.