'derogation' originates from Latin, specifically the word 'derogatio,' where 'de-' meant 'down' and 'rogare' meant 'to ask or propose.'

'derogatio' transformed into the Old French word 'derogation,' and eventually became the modern English word 'derogation' through Middle English.

Initially, it meant 'to propose a reduction,' but over time it evolved into its current meaning of 'detracting from value or importance.'