用件
ようけん · youken · JLPT N1 · noun
business
用 — pictograph of a bucket or wooden pail
用 originally depicted a bucket or container, possibly a sacrificial vessel made of wood. Over time it was borrowed to mean 'to use' or 'employ,' losing its concrete object sense. The modern meaning 'use' has been standard since early classical Chinese.
件 — person radical 亻 + ox 牛
件 combines the person radical 亻 with 牛 (ox). Originally it referred to dividing or counting items, with oxen being valuable units of property to count. It came to mean a measurable item or matter, and today serves as a measure word for things, documents, and affairs.