The spelling of the word "guilbeault" can be confusing due to its French origin. In IPA phonetic transcription, the word is pronounced as "ɡil.bo", with a silent "t" at the end. The letter "a" is pronounced as "ɔ" in French, giving the word a distinct pronunciation. The combination of letters "eau" is pronounced as "o" in French, adding to the complexity of the spelling. Overall, the word "guilbeault" requires careful attention to both its French origin and unique spelling.