親しん交こうを深ふかめる

expression, ichidan verb

deepen a friendship; build intimacy; develop a relationship

Used for strengthening personal bonds, often in formal or written contexts. Implies a deliberate effort to become closer.

• 両りょう国こくの首しゅ脳のうは会かい談だんを通つうじて親しん交こうを深ふかめた。

  The leaders of both countries deepened their friendship through the summit meeting.

• 共きょう通つうの趣しゅ味みを通つうじて親しん交こうを深ふかめることができた。

  We were able to build intimacy through a shared hobby.