What is the root word that indicates a bending condition of the spine?

The root word that indicates a bending condition of the spine is "lord/o." This term specifically refers to a curvature in the spine, particularly hyperlordosis, which denotes a bending or increase in the normal inward curvature of the lumbar region. In medical terminology, "lordosis" is the condition characterized by an excessive inward curve, and the use of "lord/o" directly denotes this bending characteristic.

The other root words serve different functions: "spondyl/o" relates to vertebrae in general and does not specify bending. "my/o" pertains to muscle, and "por/o" refers to pores or passageways in tissues, neither of which describe curvature or bending of the spine. Thus, "lord/o" is the most appropriate choice for indicating a bending condition of the spine.