1) Exclusively Anglo word 2) Exclusively Saxon word 3) Fortification 4) Munition 5) Shield against frontal fire 6) Shield from enemy eyes 7) Word with Anglo-Saxon origins 8) Word of purely Anglo origin 
to arrange fortifications against frontal attack
• (v. t.) To raise, as a rampart, so as to shelter interior works commanded from some higher point.
1. Protection from hostile observation and fire provided by an obstacle such as a hill, ridge, or bank. 2. A vertical distance by which a position is concealed from enemy observation. 3. To shield from enemy fire or observation by using natural or artificial obstacles.
De`fi·lade' transitive verb [ imperfect & past participle Defiladed ; present participle & verbal noun Defilading .] [ Confer French défiler to defile, and défilade act of defiling. See 1st Defile .] (Mil.)
[n] - the arrangement of defensive fortifications to protect against enemy fire
noun the arrangement of defensive fortifications to protect against enemy fire