Cause to fluctuate or move in a wavelike pattern.

Roget 605: be irresolute etc. adj.; hang in suspense, keep in suspense; leave "ad referendum"; think twice about, pause; dawdle etc. (inactivity) 683; remain neuter; dillydally, hesitate, boggle, hover, dacker^†, hum and haw, demur, not know one's own mind; debate, balance; dally with, coquet with; will and will not, chaser-balancer^†; go halfway, compromise, make a compromise; be thrown off one's balance, stagger like a drunken man; be afraid etc. 860; let 'I dare not' wait upon 'I would'" [Macbeth]; falter, waver vacillate etc. 149; change etc. 140; retract etc. 607; fluctuate; pendulate^†; alternate etc. (oscillate) 314; keep off and on, play fast and loose; blow hot and cold etc. (caprice) 608.    shuffle, palter, blink; trim.    ... show more

Move or sway in a rising and falling or wavelike pattern.

synonyms: vacillate, waver.

Roget 314: oscillate; vibrate, librate^†; alternate, undulate, wave; rock, swing; pulsate, beat; wag, waggle; nod, bob, courtesy, curtsy; tick; play; wamble^†, wabble^†; dangle, swag.    fluctuate, dance, curvet, reel, quake; quiver, quaver; shake, flicker; wriggle; roll, toss, pitch; flounder, stagger, totter; move up and down, bob up and down etc. adv.; pass and repass, ebb and flow, come and go; vacillate etc. 605; teeter [U.S.].    brandish, shake, flourish.    ... show more

Roget 149: fluctuate, vary, waver, flounder, flicker, flitter, flit, flutter, shift, shuffle, shake, totter, tremble, vacillate, wamble^†, turn and turn about, ring the changes; sway to and fro, shift to and fro; change and change about; waffle, blow with the wind (irresolute) 605; oscillate etc. 314; vibrate between, two extremes, oscillate between, two extremes; alternate; have as man phases as the moon.    ... show more

Be unstable.

Dutch: losstaan, schommelen, vrijstaan