The word "烟熏火燎" is formed by combining two parallel binomial phrases: "烟熏" meaning "smoked by smoke" and "火燎" meaning "scorched by fire", where each character contributes directly to the literal meaning, 烟 (smoke), 熏 (to fumigate), 火 (fire), 燎 (to burn), resulting in a compound that vividly depicts an environment affected by both smoke and heat.