γυιόδαμος
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)
η, ον, taming limbs, conquering, ἐν γυιοδάμαις… χερσίν Pi.I.5(4).59: unless from Subst. γυιόδάμας, ὁ, athlete.
