the word "sulfurous" is a modern english formation directly combining the base noun "sulfur" with the adjectival suffix "-ous." the latin root sulfur referred to the combustible yellow mineral, known for its distinctive, pungent smell when burned. the suffix "-ous," of latin origin, conveys the meaning "abounding in" or "having the qualities of." thus, the literal construction yields "full of sulfur," which logically extends from describing physical properties like a foul odor or yellow color to metaphorically characterizing speech or atmospheres as being similarly acrid, fiery, or hellish.

Structure: sulfur (chemical element) + ous (adjective suffix) sulfur (from latin sulfur, sulphur, meaning brimstone, sulfur); ous (from latin -osus, an adjective-forming suffix meaning "full of, characterized by").