Prefix is Intra meaning "within," and the latin word murus, meaning "walls"
Definiton; Situated or done within the walls of a building.
Answer:
A prefix is a word part added in front of a base word. In this case, the base word is mural (similar to the word wall), and the prefix is intra- (which means inside or between something). Then intramural means situated or done within the walls of a building.