塞さい内ない

noun

inside a fort

Refers to the interior of a fortress or defensive structure. Historical term; not used in modern everyday contexts.

• 塞さい内ないには兵へい士したちが待たい機きしていた。

  Soldiers were on standby inside the fort.

noun

within the Great Wall of China

Specifically denotes the area inside the Great Wall of China, often in historical or geographical contexts. Rare and specialized.

• 塞さい内ないの地ち域いきは、長ちょう城じょうによって外がい敵てきから守まもられていた。

  The area within the Great Wall was protected from external enemies by the wall.