ἀρχιδεσμοφύλαξ
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
[ῠ], ακος, ὁ,
A chief gaoler, chief jailer, chief jailor, chief corrections officer, chief warden, chief warder, LXX Ge.39.21, Ph.1.290 (pl.):—also ἀρχιδεσμώτης, ου, ὁ, LXX Ge.40.4.
German (Pape)
[Seite 366] ακος, ὁ, Oberaufseher des Gefängnisses, LXX.
Greek (Liddell-Scott)
ἀρχιδεσμοφύλαξ: καὶ ἀρχιδεσμώτης, ὁ, ὁ πρῶτος τῶν δεσμοφυλάκων, Ἑβδ. (Γεν. λθ΄. 21, κἑξ., μ΄, 4.).