The spelling of the word "Jeffers" can be explained using the International Phonetic Alphabet (IPA). The word is pronounced as /ˈdʒɛfərz/ in IPA transcription. The first syllable is pronounced with the "j" sound like "jump", followed by a short "e" sound like "peck". The second syllable is pronounced with a "f" sound like "fat", followed by a schwa sound like the "a" in "sofa". The final "s" is pronounced with a "z" sound like "buzz". Correctly spelling "Jeffers" requires attention to each of these phonetic sounds.