The Spanish word 'vértebra' comes directly from the Latin word 'vertebra', which means the same thing. The Latin term was formed by combining the verb 'vertere' meaning 'to turn or rotate' with the instrumental suffix '-bra'. This etymology makes perfect sense when you think about how vertebrae are the bones that allow our spine to turn and bend in different directions.

Some related Spanish words that share the 'vert-' root meaning 'to turn' include: 'verter' (to pour, as in turning a container), 'vertiente' (slope, where things turn downward), and 'vertical' (vertical, referring to the up-down direction).

Many English words share this same Latin root 'vertere'. Some common examples include: 'vertebra' (the same meaning as Spanish), 'vertical' (turning up and down), 'vertex' (turning point), 'convert' (to turn into something else), 'revert' (to turn back), and 'version' (a turned or altered form of something).