appal

Verb

• 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
    

• strike with disgust or revulsion
  • The scandalous behavior of this married woman shocked her friends
    

Related words

• Synonyms: 
  dismay , alarm , appall , horrify , shock , offend , scandalize , scandalise , outrage