appall

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appall (US) verb
or British appal ˈpɑːl/
appalls; appalled; appalling
appall (US)
verb
or British appal ˈpɑːl/
appalls; appalled; appalling
Learner's definition of APPALL
[+ object]
: to cause (someone) to feel fear, shock, or disgust
often used as (be) appalled