ap·pal appals appalling appalled in AM, use appall If something appals you, it disgusts you because it seems so bad or unpleasant. His ignorance appals me = horrify. to make someone feel very shocked and upset (apalir, from palir )
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"