busaw noun English. A spirit characterized as causing great insatiable thirst. Generic. diwata; menamad adjective English. Characterized as having insatiable thirst. Example sentence: Subanen. Duuni getaw sa' minum, busaun gupia pu' melauni megela'en tubig. English. There was a person who whenever she drank, was virtually insatiable, because she consumed great amounts of water. Grammar. Occurs with -en.