body
軀 centers on the physical body, especially the torso or frame, as a whole. It refers to the body itself rather than a part or an abstract concept.
軀 combines 身 (body) with 區, which likely contributes the sound and may have originally suggested a container or frame, fitting the idea of the body as a physical vessel.
The left side 身 shows a body, and the right side 區 looks like a container with compartments. Picture the body as a living container that holds everything together.
For ク, imagine a cool breeze flowing through the body's compartments: cool -> ク, keeping the body refreshed.