Her weak character made it difficult for her to make important decisions.

weak 是形容词，意思是"虚弱的、软弱的"，用来描述缺乏力量或决断力的状态。 character 在这里指"性格、品格"，指一个人内在的特质和行为模式。 weak character 指的是"软弱的性格"，形容一个人缺乏决断力或意志力。