Ask at the forum if you have an Ancient or Modern Greek query!
Δὶς ἐξαμαρτεῖν ταὐτὸν οὐκ ἀνδρὸς σοφοῦ → Qui sapit, eundem non bis errabit modum → Den selben Fehler zwei Mal macht kein kluger Mann
bog: P. ἕλος, τό, Ar. and P. τέλμα, τό.
skin of a serpent: V. χιτών, ὁ (Euripides, Iphigenia in Tauris 288).