교(交)-exchange; interaction
The character 교 (交) generally relates to exchange, interaction, communication, or coming into contact with others. Words with 交 often describe how people connect—whether through social relationships, cultural exchange, communication, or mutual interaction. In Korean, 交 appears in vocabulary referring to social networks, interpersonal relationships, international exchange, and cooperation. Because of this, many Korean words containing 交 express ideas of meeting, sharing, communicating, or engaging with others.
단어 Words
교류(交流) – exchange; interchange
교섭(交涉) – negotiation
교환(交換) – exchange; swap
교대(交代) – shift; taking turns
외교(外交) – diplomacy
친교(親交) – close friendship
사교(社交) – socializing
교제(交際) – relationship; association
교차(交差) – intersection; crossing
교통(交通) – traffic; transportation

문장 Sentences
두 나라 간의 문화 교류가 활발하다: There is active cultural exchange between the two countries.
노동조합이 회사와 교섭을 벌이고 있다: The labor union is negotiating with the company.
학생들은 서로 책을 교환했다: The students exchanged books with each other.
야간 근무자는 아침에 교대한다: The night-shift worker is replaced in the morning.
한국은 여러 나라와 외교 관계를 맺고 있다: South Korea maintains diplomatic relations with many countries.
오랜 친구와의 친교는 소중하다: Close friendship with an old friend is precious.
그는 사교적인 성격이라 사람들과 잘 어울린다: He is sociable and gets along well with people.
두 사람은 오랫동안 교제를 이어 왔다: The two have been in a relationship for a long time.
차들이 교차로에서 멈췄다: Cars stopped at the intersection.
출근 시간에는 교통이 매우 혼잡하다: Traffic is very heavy during rush hour.