衛兵

1. Origins, structure, and basic meaning

• Structure: Written 衛兵 and read えいへい, it denotes a soldier assigned to guard a gate, palace, person, or other important place.
• Basic usage: It appears checking a pass at a castle gate and changing shifts in a story.

2. Common pitfalls and similar expressions

• Guard duty rather than soldier in general
  • The word focuses on sentry and protection duties at a designated post.