appall

Từ điển American Heritage Dictionary 4th

ap·pall (ə-pôlʹ)tr.v. ap·palled, ap·pall·ing, ap·palls
To fill with consternation or dismay. See Synonyms at dismay. [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 pallēre, to grow pale. See pel-¹ in Indo-European Roots).]