单元
dānyuán · HSK 3
unit
📦 单 = single + 元 = element → one self-contained unit/module
单 means single/sole and 元 means element/origin/primary. Together they name one discrete element of a larger whole — a module, a teaching unit, or an apartment unit in a building.
单 — 叩 (two mouths 口) over 甲 (shield/armor)
Originally a pictograph of a forked hunting weapon or shield with two prongs at the top. The ancient form shows a Y-shaped tool, later stylized into the modern shape. The meaning shifted from the weapon to 'single' or 'one,' possibly because it was a single-handed tool.
元 — 二 (two) + 兒 variant 儿 (legs/person)
元 originally depicted a person with the head emphasized on top, meaning 'head' or 'origin'. From this came the extended senses of 'first', 'beginning', and 'primary'. It was later borrowed as the name of the Yuan dynasty and the modern Chinese currency unit.