'derivational' originates from Latin, specifically the word 'derivare,' where 'de-' meant 'down from' and 'rivus' meant 'stream.'

'derivare' transformed into the French word 'dériver,' and eventually became the modern English word 'derive' through Middle English.

Initially, it meant 'to lead or draw off (water),' but over time it evolved into its current meaning of 'relating to the formation of a word from another word or base.'