The spelling of the word "dubnoff" can be explained using the International Phonetic Alphabet (IPA). The initial sound is /d/ followed by the sound of /ʌ/ in "love", which is represented with "u". The second syllable starts with the sound of /b/, followed by the sound of /n/, then the short vowel sound of /ɒ/ in "hot". Finally, the word ends with the sound of /f/. Therefore, the correct spelling of "dubnoff" can be transcribed as /ˈdʌbnɒf/.