The word "GEXSISI" is a difficult one to spell. Its pronunciation can be represented phonetically as /gɛksɪsi/. The first syllable is pronounced with a hard "g" and a short "e" sound. The second syllable is pronounced with a "k" sound, followed by a short "i" sound. The final syllable, "si", is pronounced with a short "i" sound and a soft "s". While the spelling of this word may be tricky, its phonetic transcription can help to guide correct pronunciation.