The spelling of the word "Birzavith" can be explained using the International Phonetic Alphabet (IPA). The initial consonant cluster "br" is followed by the vowel "i", pronounced as /ɪ/. The next consonant cluster is made up of the voiced fricative sound /z/ and the voiceless fricative sound /θ/. The final two letters "avith" represent the vowel /aɪ/ and the voiced fricative sound /ð/. In IPA, the complete transcription of "Birzavith" would be /ˈbɪrzəvɪθ/.