火薬

1. Origins, structure, and basic meaning

• Structure: 火薬 (かやく) is a noun for gunpowder or explosive powder.
• Basic usage: It appears as a historical subject in a museum or as a tightly stored material in a mine narrative.
  • 資料館では火薬の歴史を模型と映像で紹介している。 — The museum presents the history of gunpowder with models and video.
  • 物語の鉱山では、火薬が頑丈な箱に入れられ、厳重に保管されていた。 — In the story, the gunpowder at the mine was kept under tight security in sturdy boxes.

2. Common pitfalls and similar expressions

• Material and handling
  • 火薬 names the material. Combinations such as 箱に入れる and 厳重に保管する describe how it is contained and stored.