φιλοσυνήθης
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)
ες,
A loving one's associates, Plu.2.56c, Vett.Val. 40.14, Gloss.
German (Pape)
[Seite 1286] ες, Umgang, Gesellschaft liebend, Plut. ad. et am. discr. 18.
