騎兵

1. Origins, structure, and basic meaning

• Structure: 騎兵(きへい) is a noun for a mounted soldier or cavalry as a military arm.
• Basic usage: It identifies a unit in 騎兵の部隊 and mounted soldiers in 馬上の騎兵.

2. Common pitfalls and similar expressions

• Soldier and cavalry
  • Depending on context, it can identify an individual mounted soldier or refer collectively to cavalry.
• Relation to the horse
  • 馬上の騎兵 means cavalry on horseback; 騎兵 does not name the horse itself.