vacillate russian

• колеба́ться

  to hesitate, to waver, to vacillate, to be undecided

  to fluctuate, to vary, to range

  to sway, to swing, to rock

  to vibrate, to oscillate

• мета́ться

  to rush about, to dash to and fro, to run around frantically

  to toss and turn, to thrash about

  to waver, to vacillate, to be torn