轨道
guǐdào · HSK 6
railroad track
🛤️ guǐ = rail/track + dào = road/way — the way of the rails
轨 (guǐ) means rail or track rut, 道 (dào) means road or path. Together they literally say 'rail-road,' covering both literal train tracks and any orbital or circular path something follows.
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.