皇上
huáng shang · HSK 7
emperor
👑 皇 emperor + 上 above = the one above all; how subjects address the emperor
皇 means imperial sovereign and 上 means above or on high, so 皇上 literally stacks emperor with above to form the form of address subjects used for the reigning emperor: roughly His Imperial Majesty.
上 — horizontal line above a baseline
上 is an indicative character (指事): a short stroke placed above a longer reference line shows the concept of 'above' or 'up'. The earliest oracle-bone forms used two horizontal lines for this; the modern shape added a vertical stroke for clarity. The core meaning of 'upper, above, to ascend' has stayed stable for millennia.