The term "GNRHII" refers to a protein that plays a crucial role in the functioning of the reproductive system. The spelling of this word can be explained using the International Phonetic Alphabet (IPA). The first two letters "G" and "N" represent the consonants /ɡ/ and /n/ respectively, while "RH" indicates the consonant cluster /r/ and /h/. The last two letters "II" represent the vowel /i/ pronounced twice. Thus, the correct pronunciation of "GNRHII" can be transcribed as /ɡˌɛnˌɑrˈeɪtʃaɪ.aɪ/.