παλιμπροδότης
From LSJ
ἀλλήλων τὰ βάρη βαστάζετε, καὶ οὕτως ἀναπληρώσετε τὸν νόμον τοῦ Χριστοῦ → bear each other's burdens, and in that way fulfill the anointed King's Law (Galatians 6:2)
English (LSJ)
ου, ὁ,
A traitor to both sides, Din.Fr.89.26, D.S.15.91, App.BC5.96.
German (Pape)
[Seite 449] ὁ, der Verräther, der beide Parteien wechselsweise verräth; Din. bei Poll. 6, 164; D. Sic. 15, 91 u. a. Sp.