Starting to feel faint, Fred quickly roused himself and ran out of the hotel as quickly as he could.

feel 是动词，意思是"感觉、感受到"，指通过身体或心理感知某种状态。 faint 是形容词，意思是"微弱的、虚弱的"，在这里特指"头晕目眩的、快要昏厥的"身体状态。 feel faint 表示"感到头晕"，描述一种即将昏厥的身体不适感。