δι' ἐρημίας πολεμίων πορευόμενος → he marched on without finding any enemy, his route lay through a country bare of enemies
(ἀμβρόσιος), adj. used as subst.: ambrosia; the food of the gods and of their steeds; also used as ointment, for embalming, for perfume.
ἄμβροτοςambrosia (i.e. immortality), the food of the gods, Hom., etc.