The Chinese word 大腿 (dàtuǐ, meaning "thigh") is formed through a straightforward, conceptual combination of its two component characters: 大 (dà), meaning "big" or "large", and 腿 (tuǐ), meaning "leg". It is a descriptive compound where the first character modifies the second, directly pointing to the upper, thicker part of the leg by literally naming it the "big leg" or "major leg" section, creating an immediate and visually logical representation of the body part.