ἀνθυβρίζω
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)
A abuseone another, abuse inturn, E.Ph.620 (Pass.), Plu. Per.26, Luc.DMeretr.33, etc.
German (Pape)
[Seite 235] dagegen, gegenseitig mißhandeln, beleidigen, Plut. Pericl. 26, oft; Luc. D. Mar. 3. – Pass., Eur. Phoen. 620.
Greek (Liddell-Scott)
ἀνθυβρίζω: μέλλ. -ίσω, ἀνταποδίδω τὴν ὕβριν, μεταχειρίζομαι καὶ ἐγὼ μετὰ τρόπου ὑβριστικοῦ, οἱ δὲ Σάμιοι τοὺς αἰχμαλώτους τῶν Ἀθηναίων ἀνθυβρίζοντες ἔστιζον εἰς τὸ μέτωπον γλαῦκας Πλουτ. Περικλ. 26, κτλ.