shake

convulse disturb jolt rattle rock roil shudder sway swing upset wave

agitate brandish bump chatter churn commove concuss discompose disquiet dither dodder flap flicker flit flitter flourish fluctuate flutter jar jerk jog joggle jounce move oscillate palpitate perturb quail quake quaver reel ruffle shimmer shimmy shiver stagger succuss totter tremor twitter vibrate waggle water whip wobble

set in motion stir up

steady

be still

disturb frighten horrify intimidate rattle throw undermine unnerve unsettle upset weaken worry

bother consternate daunt discompose dismay distress impair jar move unstring

knock the props out (from under) make waves throw a curve

appease calm comfort delight encourage help make happy please reassure soothe

aid

placate