The spelling of the word "Ulltima" can be explained using IPA phonetic transcription. The first two letters "Ul" are pronounced as [ʌl], with the "u" sound being pronounced as the schwa sound. The double consonants "lt" are pronounced as [l̥t], with a voiceless "l" sound. The final three letters "ima" are pronounced as [ɪmə], with the "i" sound being pronounced as the short "i" sound and the final "a" sound being pronounced as the schwa vowel sound. Together, they form the word "Ulltima".