The spelling of the word "JESA" can be explained using the International Phonetic Alphabet (IPA). The first sound is "dʒ", which represents the "j" sound, followed by "ɛ", which represents the "e" sound in "bed." The final sound is "s", representing the "s" sound. Thus, "JESA" is pronounced as "jeh-suh." While it may seem like a peculiar spelling, understanding the IPA can help with deciphering and correctly pronouncing unfamiliar words.