无线
wú xiàn · HSK 7
wireless
📶 无 (without) + 线 (wire) = without-wire = wireless
无 means without or none; 线 means wire, thread, or line. Stick them together and you get without-a-wire, which is exactly wireless. The same 线 shows up in 电线 (electric wire) and 线路 (circuit line).
无 — top 一 + 林-like middle + fire radical 灬 below
Originally a pictograph of a person dancing while holding ornaments or tassels, meaning 'to dance' — the ancestor of 舞. It was borrowed phonetically to write the negative 'not have / without,' and the dance meaning was reassigned to 舞 with an added foot element. The simplified form 无 comes from an ancient variant.
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.