The word "Woollypastinum" is a fictional term and therefore has no set pronunciation. However, if we were to follow English spelling conventions, the word can be broken down phonetically as "wʊliˈpæstɪnəm". The "w" sound is followed by a short "u" sound, "l" and "y" sounds, then "p", "a", "s" and "t" sounds. The "i" sound is followed by an "n" sound and ends with a short "u" and "m" sound. English spelling can often be confusing, but breaking it down using the International Phonetic Alphabet (IPA) can help clarify the pronunciation.