entrenchment
From LSJ
Ἀναξαγόρας δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Anaxagoras used to say that we have two teachers for death: the time before we were born and sleep | Anaxagoras said that there are two rehearsals for death: the time before being born and sleep
fort: P. τείχισμα, τό, P. and V. ἔρυμα, τό, τεῖχος, τό.
palisade: P. σταύρωμα, τό, χάρκωμα, τό.
act of fortifying: P. τείχισις, ἡ, τειχισμός, ὁ, σταύρωσις, ἡ.
digging of entrenchments: P. ταφρεία, ἡ.