appall

(verb) strike with disgust or revulsion. Synonyms: shock, offend, scandalize, scandalise, appal, outrage. Example: "The scandalous behavior of this married woman shocked her friends."

(verb) fill with apprehension or alarm; cause to be unpleasantly surprised. Synonyms: dismay, alarm, appal, horrify. Examples: "I was horrified at the thought of being late for my interview." "The news of the executions horrified us."