verb (v)

• cause to fluctuate or move in a wavelike pattern(verb.motion)

  source: wordnet30
• move or sway in a rising and falling or wavelike pattern(verb.motion)

  Synonym:
  vacillate, waver
  

  source: wordnet30
• be unstable(verb.change)

  Example:
  The stock market fluctuates.
  

  source: wordnet30
• To move as a wave; to roll hither and thither; to wave; to float backward and forward, as on waves; as, a fluctuating field of air.(verb)

  source: webster1913
• To cause to move as a wave; to put in motion.(verb)

  source: webster1913