ψάλλειν
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
Greek > English (Woodhouse Verbs Reversed)
(see also ψάλλω): a musical instrument, play a stringed instrument, play an instrument, play on a stringed instrument, sweep the strings of a musical instrument
