The word 肢体 is formed by combining two characters, each representing a core physical concept: 肢 (zhī), which specifically means "limb", and 体 (tǐ), which means "body". The formation is ideographic, where the more specific element (limb) is joined with the general element (body) to create a composite meaning that refers to "the body and its limbs" or "the physical limbs of the body" as a unified whole. It’s a direct, logical pairing of related concrete ideas to express a complete physical form.