The spelling of the word "tier bit" can be quite confusing. The first sound is a /t/ followed by a vowel sound /iə/ which is represented by the combination of the letters "ie". The second word is spelled as it sounds with a /b/ and a short /ɪ/ sound. There is also some debate about whether the first word should be spelled as "tear" or "tier" depending on the context. Overall, the IPA phonetic transcription of /tɪərbɪt/ helps clarify the pronunciation of this word.