flabbergast
verb [ T often passive ] informal uk/ˈflæb.ə.ɡɑːst/ us/ˈflæb.ɚ.ɡæst/
使大吃一惊，使目瞪口呆
to shock someone, usually by telling that person something they were not expecting
He was flabbergasted when we told him how cheap it was. 我们告诉他这东西有多便宜时，他惊得目瞪口呆。