The word "烽烟" is formed by combining two characters: "烽", which consists of the fire radical (火) and the phonetic component "夆", denoting a beacon fire, and "烟", which consists of the fire radical (火) and the phonetic component "因", denoting smoke. Together, they create a compound term where both characters contribute semantically to the literal meaning of "beacon smoke", referring to the smoke signals used in ancient communication systems.