Final answer:
The word part that means "swayback" is kyph/o.
Step-by-step explanation:
The word part that means "swayback" is kyph/o. Kyph/o is a combining form derived from the Greek word "kyphos," which means "hump." It is used to refer to abnormal or excessive curvature of the thoracic spine, leading to a rounded or hunched back.
Learn more about Anatomical terms related to spinal curvature