Merriam-Webster's Collegiate® Dictionary, 11th Edition
WAVER
I. intransitive verb (wavered; wavering) see: wave
Date: 14th century
to vacillate irresolutely between choices ; fluctuate in opinion, allegiance, or direction,
2. to weave or sway unsteadily to and fro ; reel , totter , quiver , flicker , to hesitate as if about to give way ; falter , to give an unsteady sound ; quaver , see: swing waverer noun waveringly adverb
II. noun
Date: 1519
an act of wavering, quivering, or fluttering,
III. noun
Date: 1835
one that waves