武器
ぶき · buki · JLPT N3 · noun
weapon
⚔️ 武器 = martial 武 + tool/vessel 器: a tool for fighting
武 (bu) means military or martial, as in 武士 bushi, warrior. 器 (ki) means tool or vessel, as in 楽器 gakki, instrument. Put together, a martial tool is a weapon.