堡ほ障しょう

noun

counterguard (fortification)

Rare, technical term in military architecture for an outer defensive work protecting a bastion.

• 堡ほ障しょうは、要よう塞さいの稜りょう堡ほの前まえに築きずかれた防ぼう御ぎょ施し設せつである。

  A counterguard is a defensive work built in front of a fortress's bastion.