fluctuate

Universal Words verb [V] ~ (between A and B) to change frequently in size, amount, quality, etc., especially from one extreme to another: fluctuating prices * During the crisis, oil prices fluctuated between $20 and $40 a barrel. * Temperatures can fluctuate by as much as 10 degrees. * The documentary follows the fluctuating fortunes of one marketing company. * My weight fluctuated wildly depending on how much I ate. * My mood seems to fluctuate from day to day. * The rate of inflation has been fluctuating around 4% for some time. fluctuation of sth(: wild fluctuations in interest rates