To vary, to vacillate,
to float.
boo
boo
Fluctuate.
A closely related word to obsequious would be compliant or enslaved.
A word meaning to work closely with someone is collaborate.
The word 'fluctuate' is a verb (fluctuate, fluctuates, fluctuating, fluctuated), a word meaning to vary irregularly.Example uses:The financial scare caused the prices to fluctuatewildly.The market's stocks have been fluctuating since 2009.Gas prices fluctuate with the price of oil.My heart's rhythm always seemed to fluctuate wildly when she entered the room.This time of year, the temperature will fluctuate as much as thirty degrees in a day.In the desert, the temperature might fluctuate dramatically from time to time.My weight tends to fluctuate.
Remain steady, stay the same, keep on an even course.Hold, persist, remain, stay...
Waver, waffle, change.
Vary, change, differ, shift, alter, waver, swing, oscillate, alternate, seesaw, yo-yo.
Example sentences for the verb to fluctuate:The financial scare caused the prices to fluctuate wildly.Gas prices fluctuate with the price of oil.My heart's rhythm always seemed to fluctuate wildly when she entered the room.This time of year, the temperature can fluctuate as much as thirty degrees in a day.In the desert, the temperature might fluctuate dramatically from day to night.
Constant, didn't fluctuate, monotonous.
Closely