通车
tōngchē · HSK 7
have transport service
🚗 通 (through/open) + 车 (vehicle) = the road is open for vehicles to pass through
通 means to pass through or be open; 车 is a vehicle or car. A road that is 通车 has been opened so traffic and transport service can run through it.
通 — 辵 (辶) walk + 甬 yǒng (phonetic)
通 is a semantic-phonetic compound. The 辶 (chuò) component means 'walk' or 'movement', giving the meaning of going through or passing. 甬 (yǒng), originally depicting a hanging bell or a path, supplies the sound. Together they convey 'to pass through, communicate, connect'.
车 — pictograph of a chariot/cart
车 is a pictograph originally drawn as a top-down view of a chariot, showing the axle, wheels, and carriage box. The ancient form 車 clearly depicted two wheels connected by an axle. It still means vehicle, cart, or car today.