μαθητός
From LSJ
ἐγγυητής τοῦ ἀργυρίου ἀξιόχρεως → trustworthy guarantor for the money
English (LSJ)
ή, όν,
A learnt, that may be learnt, ἀνθρώποις by men, X.Cyr.1.6.23; ἢ ἀσκητὸν ἢ μ. [ἡ ἀρετή] Pl.Men. 70a, cf. Arist.EN1099b9; μ. τε καὶ διδακτά Pl.Prt.319c.