μεταδῐδάσκω · metadidaskō — LSJ
teach new things, show a better way, D.H. 9.3, Anon. ap. Suid.: c. acc., convert, Gal. 8.657; πόλιν λόγῳ μεταδιδάξαι Philostr. VA 1.15: c. dupl. acc., μ. τινὰ ἑτέραν ὄρχησιν Id. Im. 2.11:—Pass., like μεταμανθάνω, learn differently, learn something new, Muson. Fr. 10p.56H., Plu. An seni 2.784b; μ. τὴν διάλεκτον τὴν Δωρίδα Paus. 4.27.11; also, change oneʼs mind for the worse, D.S. 13.28: more freq. for the better, Id. 21.21, al.