The word 没用 is formed by directly combining two independent characters: 没 (méi), which conveys the idea of "not having" or "absence", and 用 (yòng), which means "use" or "utility". The concept is constructed by placing the notion of absence before the notion of function, creating a simple, logical sequence where the first character negates the inherent value of the second. It is a straightforward conceptual blend, picturing a state where utility is missing or void, resulting in the integrated meaning of "useless".