fluctuate
fluc|tu|ate /fl'ʌktʃueɪt/ (fluctuates fluctuating fluctuated)
[VERB] V, V-ing
If something fluctuates, it changes a lot in an irregular way.
Body temperature can fluctuate if you are ill.
...the fluctuating price of oil.
● fluctuation [N-VAR] usu N in/of n
Don't worry about tiny fluctuations in your weight...
The calculations do not take into account any fluctuation in the share price.
[VERB] V, V-ing
If something fluctuates, it changes a lot in an irregular way.
Body temperature can fluctuate if you are ill.
...the fluctuating price of oil.
● fluctuation [N-VAR] usu N in/of n
Don't worry about tiny fluctuations in your weight...
The calculations do not take into account any fluctuation in the share price.