She wasn't sure if the storm was a real tornado, but she sensed the danger.

tornado 是名词，指"龙卷风"，一种猛烈的旋转风暴，形状像漏斗云，风速极快且破坏力极强。这个词源自西班牙语"tronada"（雷暴）和"tornar"（旋转）的组合，形象地描述了这种风暴的特征。