The Collaborative International Dictionary of English v.0.48:
Waver \Wa"ver\, v. i. [imp. & p. p. Wavered; p. pr. & vb. n.
Wavering.] [OE. waveren, from AS. w[ae]fre wavering,
restless. See Wave, v. i.]
1. To play or move to and fro; to move one way and the other;
hence, to totter; to reel; to swing; to flutter.
With banners and pennons wavering with the wind.
Thou wouldst waver on one of these trees as a terror
to all evil speakers against dignities. --Sir W.
2. To be unsettled in opinion; to vacillate; to be
undetermined; to fluctuate; as, to water in judgment.
Let us hold fast . . . without wavering. --Heb. x.
In feeble hearts, propense enough before
To waver, or fall off and join with idols. --Milton.
Syn: To reel; totter; vacillate. See Fluctuate.