πρόφυλαξ
From LSJ
ὁ δ' εὖ ἔρδων θεοὺς ἐλπίδι κυδροτέρᾳ σαίνει κέαρ → but he who does well to the gods cheers his heart with a more glorious hope
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.