交流

1. Origins, structure, and basic meaning

• Structure: Written 交流 and read こうりゅう, it means mutual exchange or interaction and can also refer to alternating current.
• Basic usage: It is used for cultural contact, community meetings, and electrical contexts.

2. Common pitfalls and similar expressions

• Reciprocity is central
  • The ordinary social sense involves two-way contact rather than one-sided transmission.