The spelling of the word "TIEWAY" is not commonly used, and it is not listed in most dictionaries. Nevertheless, the word can be broken down into two parts: "tie" and "way." The first part, "tie," is pronounced as /taɪ/, with the diphthong "ai" representing the vowel sound. The second part, "way," is pronounced as /weɪ/, with the diphthong "ay" again representing the vowel sound. Therefore, the IPA phonetic transcription of "TIEWAY" is /taɪweɪ/.