The spelling of the word "bordenave" can be quite tricky due to its uncommon pronunciation. In IPA phonetic transcription, it is pronounced as /bɔ:rdəneɪv/. This means that the first syllable is pronounced with an open "o" sound followed by the "r" sound. The second syllable has the "d" and "n" sounds merged together into a soft nasal sound, and the last syllable is emphasized with the "eɪ" diphthong. Overall, mastering the spelling and pronunciation of "bordenave" can be accomplished with enough practice and familiarity with IPA phonetics.