Wavered

verb

1. To sway back and forth; to totter or reel.

   "Flowers wavered in the breeze."

2. To flicker, glimmer, quiver, as a weak light.
3. To fluctuate or vary, as commodity prices or a poorly sustained musical pitch.
4. To shake or tremble, as the hands or voice.

   "His voice wavered when the reporter brought up the controversial topic."

5. To falter; become unsteady; begin to fail or give way.