The Chinese word **腰部** (yāobù), meaning "waist" or "lumbar region," is a compound noun formed through a straightforward modifier-head (or *attribute-center*) structure. The first character, **腰** (yāo), independently means "waist" or "loins," and it acts as the modifier specifying the type of **部** (bù), which means "part" or "section." Thus, the combination literally translates to "the waist part" or "the section that is the waist," a common and logical pattern in Chinese for naming specific areas of the body.