乱らん杭ぐい

noun

irregularly placed stakes (defensive obstacle)

Historical military term for stakes driven into the ground or underwater at irregular angles and intervals to impede enemy movement. Typically encountered in descriptions of fortifications or castle defenses.

• 城しろの周しゅう囲いには乱らん杭ぐいが仕し掛かけられていた。

  Irregular stakes were set up around the castle.

• 水すい中ちゅうに乱らん杭ぐいを打うち込こんで敵てき船せんの侵しん入にゅうを防ふせいだ。

  They drove irregular stakes into the water to prevent enemy ships from entering.