1275-1325;Middle English (see wave, -er6); cognate with dialectal Germanwabern to move about, Old Norsevafra to toddle
4. quiver. 5. Waver, fluctuate, vacillate refer to an alternation or hesitation between one direction and another. Waver means to hesitate between choices: to waver between two courses of action. Fluctuate suggests irregular change from one side to the other or up and down: The prices of stocks fluctuate when there is bad news followed by good. Vacillate is to make up one's mind and change it again suddenly; to be undecided as to what to do: We must not vacillate but must set a day.
c.1280, weyveren, "to show indecision," probably related to O.E. wæfre "restless, wavering," from P.Gmc. *wæbraz (cf. M.H.G. wabern "to waver," O.N. vafra "to hover about"), a frequentative form from the root of wave (v.).