μετωποσώφρων
From LSJ
ἀρχὴ παιδεύσεως ἡ τῶν ὀνομάτων ἐπίσκεψις → the beginning of education is the examination of names, the beginning of philosophical education is the examination of names, the beginning of all education is the investigation of names
English (LSJ)
ον, gen. ονος,
A with modest countenance, A.Supp.198 (cj. Pors.).