视线
shì xiàn · HSK 7
sight
👁️📏 视 (sight) + 线 (line) = sight-line, the straight line your eyes travel along
线 — silk radical 纟 + 戋 (jiān, phonetic)
线 is a semantic-phonetic compound. The silk radical 纟 signals the meaning 'thread' or 'string,' while 戋 hints at the sound. Originally referring to silk thread, its meaning broadened to any thin line, wire, or route. The traditional form is 線.