由于极度恐惧，她突然陷入失语状态，说不出话来。

Overwhelmed by fear, she was struck with sudden ___dumbness and couldn't utter a word.

他拒绝听取专家的建议，表现出令人难以置信的愚蠢。

His refusal to listen to expert advice showed an incredible level of ___stupidity.

这部电影的愚蠢程度让我差点中途离场。

The ___dumbness of this movie almost made me walk out halfway through.