The spelling of the word "Clerysse" can be explained using the International Phonetic Alphabet (IPA). The word is pronounced /klɛːrəs/ and originates from the French word "clérisse" which means "to clear up". The "y" in the spelling represents the French sound "i" which is pronounced as /i/ and the extra "s" at the end of the word is there to emphasize the "s" sound. Overall, the spelling of "Clerysse" is unique and reflects its French origins.