φυλακιστής
From LSJ
διὸ καὶ μεταλάττουσι τὴν φυσικὴν χρῆσιν εἰς τὴν παρὰ φύσιν αἱ δοκοῦσαι παρθένοι τῶν εἰδώλων → therefore those professing to be virgins of the idols even change the natural use into the unnatural (Origen, commentary on Romans 1:26)
Greek (Liddell-Scott)
φῠλακιστής: -οῦ, ὁ, Λατ. phylacistes ἐν Plaut Aul. 3. 5, 44, δεσμοφύλαξ, ἐπίθ. αὐστηροῦ δανειστοῦ. 2) = ξυλοπέδη Ἰω. Λυδ. 158.