"COSDUNA" is a misspelled word that does not have any established meaning in English. However, if we break down the spelling using IPA phonetic transcription, we can understand how it should be pronounced: /kɑz.du.nə/. The initial sound is a voiceless velar stop (/k/), followed by a mid-open back unrounded vowel (/ɑ/). The next two syllables both begin with a voiced alveolar fricative (/z/) and end with a schwa (/ə/), while the final syllable is pronounced with a voiced alveolar nasal (/n/).