Source : Webster's Revised Unabridged Dictionary (1913)

Waverer \Wa"ver*er\, n.
   One who wavers; one who is unsettled in doctrine, faith,
   opinion, or the like. --Shak.

Source : WordNet®

waverer
     n : one who hesitates (uaually out of fear) [syn: {vacillator},
         {hesitator}, {hesitater}]