The spelling of the word "CHUK" can be explained using the International Phonetic Alphabet (IPA). This word is pronounced as /tʃʌk/ in IPA, where the first sound is a voiceless alveolo-palatal affricate /tʃ/ and the second sound is a back unrounded vowel /ʌ/. Together, these sounds form the word "CHUK." It is important to understand phonetic transcriptions when contemplating the spelling of a word, as they allow for greater accuracy in pronunciation and communication.