reins

Etymology 1
See rein

Etymology 2
From, see also in French.

Noun

 * 1)  The kidneys.
 * 2) The lower part of the back.
 * 3) The loins.
 * 4)  The parts of a vault between the crown and the spring or abutment, including, and having especial reference to, the loading or filling behind the shell of the vault.

Noun

 * 1) small of the back; waist

Noun

 * 1) small of the back; lower back