The word "THPU" is spelled using the International Phonetic Alphabet (IPA) as /θpu/. The initial sound is a dental fricative "th" (/θ/), followed by a bilabial stop "p" (/p/), and ending with an unrounded high back vowel "u" (/u/). The phonetic transcription of this word clearly illustrates the sequence of sounds that make up the word. While it may not be a commonly used word, the IPA provides a universal method to accurately transcribe and understand pronunciation.