The spelling of the word "koelzer" can be explained using the International Phonetic Alphabet (IPA). The first syllable is pronounced as "kɛl", with the "e" sounding like the "e" in "pet". The second syllable is pronounced as "zɛr", with the "z" sounding like the "z" in "zebra" and the "e" once again sounding like the "e" in "pet". The "o" in "koelzer" is pronounced like the "o" in "go". Overall, "koelzer" is pronounced as "kɛlzɛr".