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Verb: appall  u'pol
Usage: US (=appal)
  1. Strike with disgust or revulsion
    - shock, offend, scandalize, scandalise [Brit], appal [Brit, Cdn], outrage
     
  2. Fill with apprehension or alarm; cause to be unpleasantly surprised
    - dismay, alarm, appal [Brit, Cdn], horrify

Derived forms: appalling, appalls

Type of: affright, churn up, disgust, fright, frighten, nauseate, revolt, scare, sicken