The spelling of "fetter bone" can be a bit confusing due to the unique pronunciation of the word. In IPA phonetic transcription, it would be spelled /ˈfɛtər boʊn/. The "fetter" part is pronounced with a short "e" sound like in "pet," followed by a "t" sound and then an "er" sound like in "herd." The "bone" part is pronounced with a long "o" sound like in "phone" and then a "n" sound. So in summary, "fetter bone" is pronounced like "FET-er BOHN."