His magic show was stupefyingly amazing.

stupefyingly 是由动词 stupefy（使震惊、使目瞪口呆）加上副词后缀 -ingly 构成的副词。stupefy 来自拉丁语 stupēre（惊讶），表示"使人极度惊讶或震惊"。 stupefyingly 的意思是"令人震惊地、惊人地"，用来强调程度之深。