The word 轻微 is formed by combining two characters, 轻 (qīng) meaning "light" in weight and 微 (wēi) meaning "tiny" or "subtle". Their conceptual meanings are directly merged, with each character contributing a layer of the same essential idea, smallness or slightness, to create a unified, reinforced concept describing something that is minor, light, or not serious. It is a straightforward semantic compound where the two parts echo and amplify each other.