区域
くいき · kuiki · JLPT N2 · noun
zone
🗺️ 区 (district) + 域 (territory) = a zone that is a district and territory
区 means a district or ward, and 域 means a territory or boundary. Put together they name a bounded zone or area, such as a zone on a map.
区 — enclosure 匚 + 品 (items)
Originally a pictograph of items (品) hidden inside a container (匚), meaning to store or conceal. The sense extended to a bounded space, then to an administrative district or area. As a surname read Ōu, it preserves the older 'hidden/enclosed' nuance.