Infuriated- Verb—to make (someone) very angry: to make (someone) furious
The word is found on Beloved ( pg 295)
“Denver thought she understood the connection between her mother and Beloved. Sethe was trying to make up for the handsaw; Beloved was making her pay for it. But there would never be an end to that, and seeing her mother diminished shamed and infuriated her. “
The meaning of the word that I understand is that Denver was very angry about seeing the way her mother treated Beloved which she tried to fulfilled all Beloved needs and she was making up for what she did to her . Her mother was afraid as if she would leave if she did not fulfill her needs. Beloved was demanding more and more for her mother as if she supposed to pay back for what she had done to her and Denver knew that that will never be end.
http://www.merriam-webster.com/dictionary/infuriate