- pause or hold back in uncertainty or unwillingness;
"Authorities hesitate to quote exact figures"
- be unsure or weak;
"Their enthusiasm is faltering"
- move hesitatingly, as if about to give way
- move or sway in a rising and falling or wavelike pattern;
"the line on the monitor vacillated"
- move back and forth very rapidly;
"the candle flickered"
- sway to and fro
- give off unsteady sounds, alternating in amplitude or frequency