"appall" in the verb sense

1. shock, offend, scandalize, scandalise, appal, appall, outrage

strike with disgust or revulsion

"The scandalous behavior of this married woman shocked her friends"

2. dismay, alarm, appal, appall, horrify

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"

Source: WordNet® (An amazing lexical database of English)

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