根ね城じろ

noun

stronghold; citadel

Refers to a fortified place or a secure base, often in a military or historical context.

• 敵てきは山やまの上うえの根ね城じろに立たてこもった。

  The enemy holed up in their stronghold on the mountain.

noun

base of operations; headquarters

Extended use for a place where someone or a group is based, such as a gang's hideout or a company's main office.

• ここが彼かれらの活かつ動どうの根ね城じろだ。

  This is their base of operations.