The spelling of the word "black whack" can be explained using the International Phonetic Alphabet (IPA). The first syllable, "black," is pronounced with the phonemes /bl/ representing the consonant blend of the voiced bilabial plosive /b/ and the voiced alveolar lateral fricative /l/. The second syllable, "whack," is pronounced with the phonemes /wæk/ representing the voiced labiovelar approximant /w/ and the unvoiced alveolar plosive /k/. Together, the word is pronounced as "blak wak."