She looked at him resentfully, as he had once again ignored what she said.

resentfully 是形容词 resentful 的副词形式。resentful 由前缀 re-（表示"再次"）和动词 sent（来自拉丁语 sentire，意为"感觉"）加上形容词后缀 -ful 组成，字面意思是"再次感受到的"，引申为"愤恨的、不满的"。 resentfully 表示"愤恨地、不满地"，描述一种带着怨恨情绪的行为方式。