Fluctuate
Part of speech: verb
Definition: To vary irregularly; to swing. To undulate. To cause to vary irregularly.
Example sentence: In 100m, the timings fluctuate.
Waver
Part of speech: verb
Definition: To sway back and forth; to totter or reel.To flicker, glimmer, quiver, as a weak light.To fluctuate or vary, as commodity prices or a poorly sustained musical pitch.To shake or tremble, as the hands or voice.To falter; become unsteady; begin to fail or give way.To be indecisive between choices; to feel or show doubt or indecision; to vacillate.
Part of speech: noun
Definition: An act of wavering, vacillating, etc.Someone who waves, enjoys waving, etc.Someone who specializes in waving (hair treatment).A tool that accomplishes hair waving.
Example sentence: There comes a time in the history of nations when fear and forgetfulness cause a nation to hesitate, to waver, and perhaps even to succumb. When that time comes, those who love liberty must rise to the occasion. Will you lovers of liberty rise to the occasion?