SYNONYMS
discompose, unnerve, upset, disturb, disquiet, make anxious, make uneasy, perturb, discomfit, disconcert, alarm, confuse, nonplus, bewilder, confound, perplex
daunt, dismay, trouble, bother, agitate, fluster, ruffle, jolt, shake, shake up, throw, put off, take aback, unbalance, destabilize, throw off balance, put someone off their stroke, pull the rug from under, pull the rug out from under
informal rattle, faze, psych out