The spelling of the word "OISQ" follows the International Phonetic Alphabet (IPA) where each letter represents a specific sound. The first letter "O" is pronounced as /oʊ/ (a diphthong representing the sounds /o/ and /ʊ/ together). The second letter "I" is pronounced as /ɪ/ (a short "ih" sound). The third letter "S" is pronounced as /s/ (a "ss" sound). The fourth letter "Q" is pronounced as /kw/ (a combination of "k" and "w" sounds). Therefore, the phonetic transcription of the word "OISQ" is /oʊɪs kw/.