ἐφηβοσύνη
From LSJ
ὅταν δὲ τἄμ' ἀθυμήσαντ' ἴδῃς, σύ μου τὸ δεινὸν καὶ διαφθαρὲν φρενῶν ἴσχναινε παραμυθοῦ θ' → whenever you see me despondent over my situation, do what you can to lessen and relieve what is wild and senseless in my thinking | whenever you see me despondent, you must cure the grim derangement of my mind and encourage me
English (LSJ)
ἡ,
A age of an ἔφηβος, adolescence, AP6.282.6 (Theod.).
German (Pape)
[Seite 1117] ἡ, das Jünglingsalter, Alter u. Stand des ἔφηβος, Theodorid. 3 (VI, 282).
Greek (Liddell-Scott)
ἐφηβοσύνη: ἡ, ἡλικία τοῦ ἐφήβου, ἡ νεανικὴ ἡλικία, Ἀνθ. Π. 6. 282.