Why 'Excuse' Doesn't Use 'G' for the /k/ Sound

The sound change from /k/ to /g/ is known as voicing assimilation, which occurs when a voiceless sound (/k/) is followed by a voiced sound (/z/ in the case of 'excuse'). It is a natural process in English pronunciation, and the resulting sound is not always spelled with a 'g'. Therefore, the correct phonetic transcription of 'excuse' would be /ɪkˈskjuːz/.