πρηνηδόν
From LSJ
ἔστιν δέ που ἡ μὲν ἐπὶ σώμασι γυμναστική, ἡ δ' ἐπὶ ψυχῇ μουσική → I think I am right in saying that we have physical exercise for the body and the arts for the soul
German (Pape)
[Seite 700] adv., vorwärts, Nonn.
Greek (Liddell-Scott)
πρηνηδόν: ἐπίρρ., «προύμυτα, κατακέφαλα», Νόνν. Εὐαγγ. κ. Ἰω. 4. 23.