The word "Guillemine" is spelled with a "gu" at the beginning, followed by "i", "l", "l", "e", "m", "i", "n", and "e". In IPA phonetic transcription, this would be /ɡɪlɪmiːn/. The "gui" sound is pronounced as a hard "g" followed by a "w" sound. The rest of the word follows typical English pronunciation rules, with stress on the second syllable. Though not a commonly used word, it is important to know its correct spelling and pronunciation.