'medieval' originates from Latin, specifically the word 'medium aevum,' where 'medium' meant 'middle' and 'aevum' meant 'age.'

'medium aevum' transformed into the French word 'médiéval,' and eventually became the modern English word 'medieval' through Middle English.

Initially, it meant 'middle age,' but over time it evolved into its current meaning of 'relating to the Middle Ages.'