"fluctuating" in the verb sense
1. fluctuate
cause to fluctuate or move in a wavelike pattern
2. fluctuate, vacillate, waver
move or sway in a rising and falling or wavelike pattern
"the line on the monitor vacillated"
3. fluctuate
be unstable
"The stock market fluctuates"
"fluctuating" in the adjective sense
1. fluctuating
having unpredictable ups and downs
"fluctuating prices"
Source: WordNet® (An amazing lexical database of English)
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