The word "nitropah" is a non-existent word, and as such, it cannot be spelled using IPA phonetic transcription. The International Phonetic Alphabet represents the sounds of speech, not imaginary words. However, if we were to use the principles of English spelling, we could break down the word phonetically as /ˈnaɪtrəʊpɑː/, where the "i" and "o" sounds are pronounced separately, and the final "a" is long. Again, it's worth noting that this word has no actual meaning or context in English.