'fluctuation' originates from Latin, specifically the word 'fluctuatio,' where 'fluctuare' meant 'to flow or wave.'

'fluctuatio' transformed into the French word 'fluctuation,' and eventually became the modern English word 'fluctuation' through Middle English.

Initially, it meant 'a flowing or waving,' but over time it evolved into its current meaning of 'a variation or change in level or amount.'