The word "BETAYAC" is spelled phonetically as /bɛtəjæk/. The first syllable "bet" is pronounced as /bɛt/, while the second syllable "ayac" is pronounced as /əjæk/. The use of the letters "y" and "c" in the second syllable is common in some Native American languages, as they represent unique sound combinations not found in English. Overall, the spelling of "BETAYAC" accurately reflects its unique phonetics and linguistic origins.