The word "Nephrine" is spelled with the IPA phonetic transcription of /ˈnɛfrɪn/. The 'n' is pronounced with the usual 'n' sound, followed by the 'e' which has a short 'e' sound. The 'p' is also pronounced normally, then the 'h' is silent, and the 'r' has a soft 'r' sound. The 'i' is pronounced with a 'short i' sound, and the 'n' at the end of the word is also pronounced with a standard 'n' sound. In summary, the proper pronunciation of Nephrine is NEF-rin, with emphasis on the first syllable.