appall

sense 1: strike with disgust or revulsion; "The scandalous behavior of this married woman shocked her friends"
shock offend scandalize scandalise appal appall outrage

sense 2: fill with apprehension or alarm; cause to be unpleasantly surprised; "I was horrified at the thought of being late for my interview"; "The news of the executions horrified us"
dismay alarm appal appall horrify