νεανικότης
From LSJ
τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
English (LSJ)
ητος, ἡ,
A youthfulness, Sext.Ps.9.1.
Greek (Liddell-Scott)
νεᾱνικότης: -ητος, ἡ, ἡ νεανικὴ ἡλικία, Ἐπιφάν. τ. 1, σ. 610D.