βλυστάνω
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)
= sq., Procl.in Cra.p.80P., Mich.in PN51.1, Et.Gud.
Spanish (DGE)
borbotear fig. τὰς πηγαίας θεότητας ἀεννάως τὰ ἀγαθὰ βλυστανούσας Procl.in Cra.80, cf. Mich.in PN 51.1, Et.Gud.274.22.