Englishwaver
verb
1 the candlelight in the room wavered in a warm draught:
flicker, quiver, tremble, twinkle, glimmer, wink, blink.
3 he had wavered between the Church of Ireland and Catholicism:
be undecided, be irresolute, be indecisive, hesitate, dither, equivocate, vacillate, fluctuate, see-saw, yo-yo;
think twice, change one's mind, get cold feet, dally, stall;
British haver, hum and haw;
informal dilly-dally, shilly-shally, pussyfoot around, blow hot and cold, sit on the fence;
rare tergiversate.
waver Oxford Dictionary of English