ἀντιδιδάσκω
From LSJ
γραμματική ἐστιν ἐμπειρία τῶν παρὰ ποιηταῖς τε καὶ συγγραφεῦσιν ὡς ἐπὶ τὸ πολὺ λεγομένων → grammar is a practical knowledge of the usage of poets and writers of prose
English (LSJ)
A inform, instruct in turn or on the other side, App.BC 5.19, AP6.236 (Phil.). II of dramatists, etc., contend for the prize, Ar.V.1410, cf. Satyr.Vit Eur.Fr.38.19, D.Chr.37.40.
