The spelling of the word "pineo" is fairly straightforward once the pronunciation is understood. In IPA phonetic transcription, "pineo" is pronounced /ˈpaɪniəʊ/. This means that the first syllable is pronounced with a long "i" sound, the second syllable has a short "i" sound, and the final syllable has a silent "e" at the end. Therefore, the spelling of "pineo" reflects its pronunciation and highlights the importance of understanding the nuances of English language rules.