The word "Brannt" is spelled with a double "n" to indicate the pronunciation of the "a" sound. It is transcribed in IPA phonetics as /bɹænt/. The "a" sound is pronounced as the short vowel "æ" sound, which can be heard in words like "cat" or "bat". The double "n" following the "a" sound indicates that the nasal consonant "n" should be pronounced twice, giving the word its distinct sound.