What does 'ipu' refer to?

The term 'ipu' refers to a gourd, specifically in the context of Hawaiian culture. Gourds have been traditionally used in Hawaii for various purposes, including making utensils, containers, and musical instruments, such as the ipu heke, which is a drum made from gourds. This cultural significance highlights the gourd's role not just as a physical object but also in Hawaiian practices and arts.

In contrast, the other options represent different meanings that are not associated with the word 'ipu.' An earth oven is known as an 'imu' in Hawaiian, while the word for old or ancient is typically expressed differently, and terms for priest or sorcerer do not align with the meaning of 'ipu' as a gourd. This context reinforces why 'ipu' is specifically recognized as a gourd within Hawaiian language and customs.