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fluctuate

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verb [intransitive] British English pronunciation: fluctuate /ˈflʌktʃueɪt/ 
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present tense
I/you/we/theyfluctuate
he/she/itfluctuates
present participlefluctuating
past tensefluctuated
past participlefluctuated
  1. to change frequently

    The price fluctuates between 50 pence and £1 per kilo.

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