組合

1. Origins, structure, and basic meaning

• Structure: 組合, read くみあい, is a noun related to 組み合う, expressing people joined together in an organization.
• Basic usage: It denotes an organization formed by people with a shared purpose, as in 農業組合 or 職人の組合.

2. Common pitfalls and similar expressions

• Scope and context
  • It is not limited to labor unions and can denote agricultural, cooperative, or professional associations; the modifier sets the scope.