The spelling of the word "Defeasanes" can be quite confusing, but it can be easily understood using IPA phonetic transcription. The word is pronounced as /dɪˈfiːzən(t)s/, which is spelled with a "de" prefix and "-easanes" suffix. The 'f' in the word is pronounced as a voiceless labiodental fricative, and the 's' at the end of the word is pronounced as a voiceless alveolar dental fricative. Overall, the spelling of "Defeasanes" can be mastered with a bit of practice and familiarity with IPA phonetic transcription.