通畅
tōng chàng · HSK 7
unobstructed
🚰 通 (pass through) + 畅 (flowing freely) = traffic, pipes, or breathing that pass through without blockage
通 carries the sense of going through or connecting; 畅 means smooth and unimpeded flow. Together they describe anything that moves freely with nothing stuck in the way: clear roads, open drains, easy breathing.
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'.