Same word as uncalm:

agitate, bewilder, bowl over, buffalo, chill, confound, daunt, demoralize, disarm, discombobulate, disconcert, discourage, dishearten, dismay, dispirit, distract, enervate, enfeeble, floor, fluster, frighten, get to, give a turn, needle, perturb, psych out, rattle, ride, sap, shake, spook, throw, throw off, uncalm, undermine, unhinge, unsettle, weaken