IPA: /ˌɪntrəpəˈrɪtəˌniəl/
KK: /ɪntrəˌpɛrəˈtoʊniəl/
Located inside the peritoneal cavity, which is the space within the abdomen that contains the intestines, liver, and other organs.
The medication was given intraperitoneally to ensure quick absorption.
Intraperitoneal is formed from "intra-" (meaning within) and "peritoneum" (from Greek "peritonaion", meaning the membrane lining the abdominal cavity). The term refers to something that is located within the peritoneal cavity.
Think of 'intra-' meaning 'within' and 'peritoneum' as the lining of the abdomen — this helps you remember that 'intraperitoneal' refers to something inside that abdominal lining.