About
The character 燧 is a phono-semantic compound incorporating the fire radical 火 alongside the phonetic component 遂, and it initially specifically denoted a fire-drill or similar apparatus for generating fire through friction. Over time, its semantic scope widened to include materials like flint, as in the compound 燧石, and it was applied to signal beacons used for military communication, exemplified by the term 烽燧. The character's structure has consistently featured the 火 element to convey its fundamental association with fire, while 遂 primarily indicates pronunciation.