The spelling of the word "bual" can be confusing for English speakers. It is actually a Scottish Gaelic word, pronounced as /buəl/ in IPA phonetic transcription. The IPA symbols show that the "b" is silent, and the "u" is pronounced as a short "oo" sound. The "a" is pronounced as a short "uh," and the "l" is pronounced with a slight rhotic accent. This rare word means "sudden noise" or "roar," and it is often used in Scottish poetry and literature.