'superfluous' originates from Latin, specifically the word 'superfluus,' where 'super-' meant 'above' and 'fluere' meant 'to flow.'

'superfluus' transformed into the Old French word 'superflue,' and eventually became the modern English word 'superfluous' through Middle English.

Initially, it meant 'overflowing or excessive,' but over time it evolved into its current meaning of 'unnecessary or more than enough.'