武器

1. Origins, structure, and basic meaning

• Structure: 武器 is read as ぶき and is a noun for a weapon used in combat or, figuratively, an ability or feature used as a competitive advantage.
• Basic usage: Referring to a physical weapon made of wood appears in 木で作られた武器, while using a bright voice as a figurative advantage appears in 声を武器にする.

2. Common pitfalls and similar expressions

• Difference from 道具
  • 武器 focuses on a means used in conflict or as an advantage rather than a general tool.