The spelling of the word "SEDSEME" can be explained using the International Phonetic Alphabet (IPA). The first syllable "SED" is pronounced as "sɛd", with a short "e" sound and a voiced "d" at the end. The second syllable "SEME" is pronounced as "sɛm", with a short "e" sound and an unvoiced "m" at the end. Therefore, the correct spelling of this word is "SEDSEME" and it represents the sound of "sɛd-sɛm".