Expand and contract rhythmically; beat rhythmically.

synonyms: pulse, throb.

Move with or as if with a regular alternating motion:
— The city pulsated with music and excitement.

synonyms: beat, quiver.

Roget 315: be agitated &c.; shake; tremble, tremble like an aspen leaf; quiver, quaver, quake, shiver, twitter, twire^†, writhe, toss, shuffle, tumble, stagger, bob, reel, sway, wag, waggle; wriggle, wriggle like an eel; dance, stumble, shamble, flounder, totter, flounce, flop, curvet, prance, cavort [U.S.]; squirm.    throb, pulsate, beat, palpitate, go pitapat; flutter, flitter, flicker, bicker; bustle.    ferment, effervesce, foam; boil, boil over; bubble up; simmer.    toss about, jump about; jump like a parched pea; shake like an aspen leaf; shake to its center, shake to its foundations; be the sport of the winds and waves; reel to and fro like a drunken man; move from post to pillar and from pillar to move from post to pillar and from pillar to post, drive from post to pillar and from pillar to drive from post to pillar and from pillar to post, keep between hawk and buzzard.    agitate, shake, convulse, toss, tumble, bandy, wield, brandish, flap, flourish, whisk, jerk, hitch, jolt; jog, joggle, jostle, buffet, hustle, disturb, stir, shake up, churn, jounce, wallop, whip, vellicate^†.    ... show more

Roget 138: recur in regular order, recur in regular succession; return, revolve; come again, come in its turn; come round, come round again; beat, pulsate; alternate; intermit.   

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

Produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses.

synonym: pulse.