Learn how to say Fluctuate correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word fluctuate:
rise and fall irregularly in number or amount:
trade with other countries tends to fluctuate from year to year
(as adjective fluctuating)
a fluctuating level of demand
mid 17th century (earlier (late Middle English) as fluctuation): from Latin fluctuat- ‘undulated’, from the verb fluctuare, from fluctus ‘flow, current, wave’, from fluere ‘to flow’