'redundant' originates from Latin, specifically the word 'redundare,' where 're-' meant 'again' and 'undare' meant 'to surge or overflow.'

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

Initially, it meant 'to overflow or be excessive,' but over time it evolved into its current meaning of 'not needed or superfluous.'