The word "deyo" is spelled as /deɪəʊ/, with the IPA phonetic transcription indicating the pronunciation of the word. The notation "/deɪ/" represents the "day" vowel sound (/eɪ/), followed by the "oh" vowel sound (/əʊ/). This spelling reflects the word's origin in the English language, possibly derived from earlier forms of English or a regional dialect. Accurate spelling is important for effective communication, as it ensures clarity and understanding between speakers and writers.