appall

ap·pall  (-pôl)

tr.v. ap·palled, ap·pall·ing, ap·palls

To fill with consternation or dismay. See Synonyms at dismay.

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[Middle English apallen, to grow faint, from Old French apalir : a-, to (from Latin ad-; see ad-) + palir, to grow pale (from pale, pale, from Latin pallidus, from pallre, to grow pale; see pel-¹ in Indo-European roots).]

Thesaurus

Verb	1.	appall - strike with disgust or revulsion; "The scandalous behavior of this married woman shocked her friends" outrage, scandalise, scandalize, appal, shock, offend churn up, sicken, disgust, nauseate, revolt - cause aversion in; offend the moral sense of; "The pornographic pictures sickened us"
	2.	appall - 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" alarm, horrify, appal, dismay affright, fright, frighten, scare - cause fear in; "The stranger who hangs around the building frightens me"; "Ghosts could never affright her" shock - strike with horror or terror; "The news of the bombing shocked her"