fluctuating
adjective
[ ˈflʌktʃʊeɪtɪŋ ]
• rising and falling irregularly in number or amount.
• "a fluctuating level of demand"
fluctuate
verb
• rise and fall irregularly in number or amount.
• "trade with other countries tends to fluctuate from year to year"
Similar:
vary,
differ,
shift,
change,
alter,
waver,
swing,
oscillate,
alternate,
rise and fall,
go up and down,
see-saw,
yo-yo,
be unstable,
be unsteady,
Opposite:
be steady,
Origin:
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’.