πρόφυλαξ
From LSJ
τὸ πεπρωμένον γὰρ οὐ μόνον βροτοῖς ἄφευκτόν ἐστιν, ἀλλὰ καὶ τὸν οὐρανόν ἔχουσι → fate is unavoidable not only for mortals, but also for those who hold the heavens
English (LSJ)
ᾰκος, ὁ, A advanced guard: οἱ π.,= αἱ προφυλακαί, Th.3.112, X.An.2.4.15, etc. II officer on guard, Aen.Tact.22.9, and so prob. in IGRom.4.455 (Pergam.).— Also fem., Eratosth.Cat.22. III epithet of Apollo, IG12(7).419.