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Fluctuate (Verb)

Be unstable; "The stock market fluctuates".

Verbs of size, temperature change, intensifying, etc..

Her moods fluctuate wildly depending on the day and situation.
The weather in this city can fluctuate dramatically from one day to the next.
Inflation rates fluctuate in response to global economic trends.
The artist's creativity tends to fluctuate as she goes through different phases in life.
Gas prices have a tendency to fluctuate according to seasonal demand.

Cause to fluctuate or move in a wavelike pattern.

Verbs of walking, flying, swimming.

The unusual shifts in air pressure can fluctuate the tides to extreme levels, resulting in coastal flooding.
These underwater currents can fluctuate the surface of the water, making navigation even more challenging for sailors.
Seismic waves from earthquakes can cause the ground to fluctuate in powerful movements.
Weather patterns have made the river's surface fluctuate wildly over the past few months.
The heat from the desert sun can fluctuate hot air in areas that further accelerate whirlwinds.

Move or sway in a rising and falling or wavelike pattern; "the line on the monitor vacillated".

Verbs of walking, flying, swimming.

The stock market can fluctuate wildly in response to economic news.
As the tide comes in, the water level will fluctuate in the nearby harbor.
Her emotions started to fluctuate after she received the news about the job interview.
Throughout the day, the temperature outside is expected to fluctuate with the wind changing direction.
In a busy restaurant, the noise level can fluctuate depending on the time of day.