牙が城じょう

noun

stronghold; inner citadel; bastion

Often used figuratively for an opponent's or enemy's base of power, especially in political, business, or competitive contexts. The literal meaning refers to the innermost fortified part of a castle.

• 敵てきの牙が城じょうを攻せめる作さく戦せんが立たてられた。

  A plan was made to attack the enemy's stronghold.

• 彼かれは長なが年ねん、政せい界かいの牙が城じょうを守まもってきた。

  He has long defended his bastion in the political world.