The spelling of the word "NAHT" might seem strange at first glance, but it actually follows the rules of English phonetics. The word is pronounced as /nɒt/, with the "a" sound being pronounced as "ah" instead of "a". This is because of a phenomenon called the "short O" sound, which occurs when the letter "a" is followed by the letter "h". Hence, "NAHT" is simply an alternative spelling of "not", pronounced in the same way.