How to say "interaction" in Japanese

• 交流こうりゅうJLPT N2approx.Common
  noun, suru verb, intransitive verbInteraction in the sense of exchange, interchange, or mingling between people or groups; the nuance is mutual, two-way contact and communication, as in cultural exchange between countries or communities.
  さらに、お年寄としよりが互たがいに交流こうりゅうし、アメリカの生活せいかつの中なかで何時なんどきまでも積極的せっきょくてきに参加さんかしていられるように、多おおくの団体だんたいが結成けっせいされている。↗

  In addition many groups have been formed so that the elderly can socialize with one another and remain active participants in American life.
• 相互作用そうごさようCommon
  nounInteraction as mutual action or influence, each party acting on the other; typical of scientific and technical contexts, such as the interaction of forces, chemicals, or drugs.
  そこで他人たにんとの相互作用そうごさようが大切たいせつになる。↗

  Then interaction with others becomes important.
• 絡みからみCommon
  nounSeldom the word you want for interaction; it really denotes linkage, entanglement, or involvement — being tangled up or mixed up with someone or something — rather than exchange or contact between parties.

Choose 相互作用 for interaction as mutual action or influence, especially in scientific contexts; 交流 for interaction as exchange or mingling between people or groups; and 「絡み」 only for entanglement or involvement, not interaction proper.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 交流こうりゅうexchange (e.g. cultural)
• 相互作用そうごさようinteraction
• 絡みからみlinkage
• インタラクションinteraction
• 相互関係そうごかんけいmutual relationship
• 交互作用こうごさよう(mutual) interaction