堵车
dǔ chē · HSK 4
traffic jam
🚗🚧 堵车 = block + vehicle (cars blocked on the road)
堵 means to block or obstruct; 车 means car or vehicle. Together they describe vehicles being blocked — a traffic jam. The 'choking' sense extends from the same blocking idea applied to flow.
堵 — earth radical 土 + 者 (phonetic)
A semantic-phonetic compound: 土 (earth) supplies the meaning, since walls and barriers were built from packed earth, while 者 hints at the sound. The original sense was a wall or embankment, which extended naturally to the modern meaning of blocking, stopping up, or obstructing.
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.