阀门
fá mén · HSK 7
valve
🔧 fá mén sounds like FA-ther at the MEN-trance — he controls who enters
A valve controls flow like a gatekeeper. The characters break down: 阀 (fá) means valve/clique and 门 (mén) means door/gate. Together they literally suggest a door that regulates passage — exactly what a mechanical valve does.
门 — pictograph of double-leaf gate
门 is a pictograph showing a pair of swinging doors hung in a doorway, originally drawn as 門 in oracle-bone script with two clear leaves. The simplified form 门 keeps the same outline with fewer strokes. It still means 'gate' or 'door' and serves as a phonetic in characters like 们, 问, and 闷.