用心棒

1. Origins, structure, and basic meaning

• Structure: 用心棒, read ようじんぼう, is a noun for a bodyguard hired to protect a person or place from danger.
• Basic usage: Hiring protection appears in 用心棒を雇う, while the guard as actor appears in 用心棒が騒ぎを止める.

2. Common pitfalls and similar expressions

• Hiring and performing the role
  • One pattern establishes the protective employment, while the other shows the person carrying out that role by stopping trouble.
• Not an ordinary employee
  • The word identifies someone assigned to protection against danger, not just any person working at a shop or for a merchant.