街道
かいどう · kaidou · JLPT N1 · noun
highway
街 — 行 (go) + 圭 (jade tablets, phonetic)
街 is a semantic-phonetic compound. The outer 行 originally depicted a crossroads and gives the meaning 'road' or 'thoroughfare'. The inner 圭 supplies the sound. Together they denote a street or public way through a town.
道 — 辶 (walk) + 首 (head)
Originally a compound of 辶 'walk/movement' and 首 'head', depicting a path one walks while looking ahead. The literal sense 'road, way' extended metaphorically to 'method, doctrine, the Way (Dao)'. This philosophical meaning became central in Daoist and Confucian thought.