peritonitis
noun [ U ] medical specialized uk/ˌper.ɪ.təˈnaɪ.tɪs/ us/ˌper.ɪ.toʊˈnaɪ.t̬əs/
腹膜炎
a serious medical condition in which the inside wall of the abdomen (= lower part of the body containing the stomach and other organs) becomes very sore and larger than its usual size, especially because of infection