The word "圆形" (yuánxíng), meaning "circular" or "round shape," is formed through a logical semantic combination of its two constituent characters: "圆" (yuán), which means "circle" or "round," and "形" (xíng), which means "shape" or "form." This is a typical example of a Chinese compound word where the first character, "圆," acts as a descriptive modifier specifying the type or quality, and the second character, "形," serves as the core noun indicating the category. Together, they create a precise and intuitive meaning—literally "circle-shape"—demonstrating the highly analytical and often visually or conceptually transparent nature of Chinese word formation.