τεσσαρεσκαιδεκέτης
From LSJ
Ἃ δέ σοι συνεχῶς παρήγγελλον, ταῦτα καὶ πρᾶττε καὶ μελέτα, στοιχεῖα τοῦ καλῶς ζῆν ταῦτ' εἶναι διαλαμβάνων (Epicurus, Letter to Menoeceus 123.2) → Carry on and practice the things I incessantly used to urge you to do, realizing that they are the essentials of a good life.
English (LSJ)
ες,
A fourteen years old, Plu.Aem.35: fem. in the form τεσσᾰρεσκαιδεκα-δεκαέτις (q.v.); cf. τεσσαρακαιδεκέτης.
Greek (Liddell-Scott)
τεσσᾰρεσκαιδεκέτης: -ου, ὁ, ὁ ἔχων ἡλικίαν δεκατεσσάρων ἐτῶν, Πλουτ. Αἰμίλ. 35.