扇
shàn · HSK 5
to fan
🪭 扇 = 户 (door) + 羽 (feathers) — a door-leaf that fans like feathers
Originally a door-leaf, then a flat fan. Now also the measure word for flat, hinged things: doors, windows, screens. The 户 on top gives both meaning and the door-like shape.
扇 — door 戶 + feather 羽
扇 combines 戶 (door) above 羽 (feathers), originally depicting a door-leaf made of woven feathers or a feathered fan that swings like a door. The image extended to flat hand-fans, then by association to anything that fans, fluffs, or stirs up — including the verb 'to fan' and a measure word for doors and windows.