The kanji 交 (kō) primarily signifies "to cross," "to intersect," "to mix," or "to exchange." It implies a coming together of two or more things, whether physically, conceptually, or in an abstract sense. It encapsulates the idea of interaction, connection, or interchange. The core meaning revolves around the idea of something interacting, joining, or mixing with something else.

・On-yomi (音読み): こう (kō) ・Kun-yomi (訓読み): まじ (maji - to mix, to mingle), まじわる (majiwaru - to cross, to intersect, to associate), かう (kau - to exchange, to trade)

⚫︎交通（こうつう） Translation: traffic, transportation ⚫︎交際（こうさい） Translation: association, social life, dating ⚫︎交換（こうかん） Translation: exchange, interchange

The kanji 交 (kō) is a pictograph. It depicts two lines crossing each other, visually representing the core meaning of intersection or crossing. Over time, the form evolved from its initial depiction of crossed lines to the current character. It originally showed two lines in an "X" shape. The upper point of the X changed into a dot and the lower one turned into a line. Then the whole shape was altered to its current form. This evolution reflects the core meaning of something intersecting, connecting, or interacting.