"waver" in the noun sense
someone who communicates by waving
2. hesitation, waver, falter, faltering
the act of pausing uncertainly
"there was a hesitation in his speech"
3. waver, flutter, flicker
the act of moving back and forth
"waver" in the verb sense
1. hesitate, waver, waffle
pause or hold back in uncertainty or unwillingness
"Authorities hesitate to quote exact figures"
2. falter, waver
be unsure or weak
"Their enthusiasm is faltering"
3. falter, waver
move hesitatingly, as if about to give way
4. fluctuate, vacillate, waver
move or sway in a rising and falling or wavelike pattern
"the line on the monitor vacillated"
5. flicker, waver, flitter, flutter, quiver
move back and forth very rapidly
"the candle flickered"
6. waver, weave
sway from side to side
7. quaver, waver
give off unsteady sounds, alternating in amplitude or frequency
Source: WordNet® (An amazing lexical database of English)
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