火か薬やく庫こ

noun

gunpowder magazine; explosives warehouse

Literal storage facility for gunpowder or explosives.

• その火か薬やく庫こは厳げん重じゅうに警けい備びされていた。

  The gunpowder magazine was heavily guarded.

noun

powder keg

Figurative use for a volatile situation that could easily explode into conflict.

• その地ち域いきは民みん族ぞく対たい立りつの火か薬やく庫こだ。

  That region is a powder keg of ethnic conflict.