The Chinese word **塑料袋** (sùliàodài), meaning "plastic bag," is a straightforward compound noun formed through semantic combination. It consists of two elements: **塑料** (sùliào), meaning "plastic" (a material), and **袋** (dài), meaning "bag" or "sack." The structure follows the common Chinese grammatical pattern of a modifier (**塑料**) placed before a core noun (**袋**), precisely indicating a "bag made of plastic material." There is no phonetic or historical derivation at play; it is a modern, logical construction that directly describes the object's composition.