窗户
chuānghù · HSK 4
window
🪟 窗 (window) + 户 (door/household) = window-opening of a house
窗 alone means window; 户 originally depicted a single-leaf door and now broadens to household or opening. The compound 窗户 fixes the meaning as the everyday word for window.
户 — single-leaf door (half of 門)
户 is a pictograph showing a single-leaf door, originally drawn as half of 門 (a double door). It came to mean 'door,' then by extension 'household' or 'family,' since a door marks one dwelling. Today it commonly means 'household' or 'account.'