appal appal /əˈpæl/

verb

1. [Canadian, British] Fill with apprehension or alarm; cause to be unpleasantly surprised  ( appal [Canadian, British] , appall [American] , dismay , alarm , horrify )
   fill with apprehension or alarm; cause to be unpleasantly surprised
    I was horrified at the thought of being late for my interview
   I was horrified at the thought of being late for my interview
    The news of the executions horrified us
   The news of the executions horrified us
   
2. [Canadian, British] Strike with disgust or revulsion  ( appal [Canadian, British] , appall [American] , offend , outrage , scandalise [British] , scandalize , shock )
   strike with disgust or revulsion
    The scandalous behavior of this married woman shocked her friends
   The scandalous behavior of this married woman shocked her friends