δι' ἐρημίας πολεμίων πορευόμενος → he marched on without finding any enemy, his route lay through a country bare of enemies
P. σπηλαῖον, τό (Plato), Ar. and V. ἄντρον, τό, αὔλιον, τό, V. θαλάμαι, αἱ, P. and V. σῆραγξ, ἡ (Plato, Phaedo. 110A and Sophocles, Fragment).
γλάφυ, γύαλον, κατῶρυξ, πέτρα, σπέος, σπήλαιον, σπῆλυγξ