What does 外交 mean?
外交 is a Japanese noun meaning “diplomacy” in English. It can also be translated as “selling (e.g. door-to-door)” depending on context. It is written as 外交 in kanji, がいこう in hiragana, and gaikou in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
英語は外交や観光事業に有効である。
English is useful in diplomacy and tourism.