The spelling of the word "tetrault" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first syllable, "tet," is pronounced as /tɛt/, with a short "e" sound followed by a hard "t" sound. The second syllable, "rault," is pronounced as /roʊ/, with a long "o" sound and a soft "l" sound. Therefore, the correct spelling of this word is "tetrault," pronounced as /tɛt-roʊlt/. It is important to accurately spell words using the correct phonetic transcription, especially when communicating with others who may not be familiar with the word.