'sluice' originates from Old French, specifically the word 'escluse,' where 'ex-' meant 'out' and 'clausus' meant 'closed.'

'escluse' transformed into the Middle English word 'scluse,' and eventually became the modern English word 'sluice.'

Initially, it meant 'a barrier for water,' but over time it evolved into its current meaning of 'a device for controlling water flow.'