agitate

shake, agitate, rock, convulse mean to move up and down or to and fro with some violence. shake often carries a further implication of a particular purpose <shake well before using>. agitate suggests a violent and prolonged tossing or stirring <an ocean agitated by storms>. rock suggests a swinging or swaying motion resulting from violent impact or upheaval <the whole city was rocked by the explosion>. convulse suggests a violent pulling or wrenching as of a body in a paroxysm <spectators were convulsed with laughter>.

discompose, disquiet, disturb, perturb, agitate, upset, fluster mean to destroy capacity for collected thought or decisive action. discompose implies some degree of loss of self-control or self-confidence especially through emotional stress <discomposed by the loss of his beloved wife>. disquiet suggests loss of sense of security or peace of mind <the disquieting news of factories closing>. disturb implies interference with one's mental processes caused by worry, perplexity, or interruption <the discrepancy in accounts disturbed me>. perturb implies deep disturbance of mind and emotions <perturbed by her husband's strange behavior>. agitate suggests obvious external signs of nervous or emotional excitement <in his agitated state we could see he was unable to work>. upset implies the disturbance of normal or habitual functioning by disappointment, distress, or grief <the family's constant bickering upsets the youngest child>. fluster suggests bewildered agitation <his declaration of love completely flustered her>.