Waver

someone who communicates by waving

the act of pausing uncertainly

the act of moving back and forth

pause or hold back in uncertainty or unwillingness

be unsure or weak

move hesitatingly, as if about to give way

move or sway in a rising and falling or wavelike pattern

move back and forth very rapidly

sway from side to side

give off unsteady sounds, alternating in amplitude or frequency