Definition of wavering in English:
 wavering
adjectiveˈweɪvərɪŋˈweɪvərɪŋ
1Moving in a quivering way; flickering.
2Becoming weaker; faltering.
 she gave a wavering smile
- 2.1 Undecided between two opinions or courses of action.
 the move brought back wavering voters
 
  Definition of wavering in US English:
 wavering
adjectiveˈwāvəriNGˈweɪvərɪŋ
1Moving in a quivering way; flickering.
2Becoming weaker; faltering.
 she gave a wavering smile
- 2.1 Undecided between two opinions or courses of action.
 the move brought back wavering voters