ap·pall·ing 
/əˈpɑ:lɪŋ/ adjective
/əˈpɑ:lɪŋ/ adjective [more appalling; most appalling] : very bad in a way that causes fear, shock, or disgust
▪ We drove by an appalling accident on the highway. ▪ Your behavior has been appalling. [=atrocious, outrageous, terrible]
▪ We drove by an appalling accident on the highway. ▪ Your behavior has been appalling. [=atrocious, outrageous, terrible]
— ap·pall·ing·ly adverb
▪ appallingly bad treatment ▪ an appallingly [=dreadfully] bad movie
▪ appallingly bad treatment ▪ an appallingly [=dreadfully] bad movie
