The word "buske" is spelled with a "s" instead of the more common "c" in the middle of the word. This spelling choice is due to the word's origin in Middle English, where "s" was often used instead of "c" in words borrowed from Old Norse. The IPA phonetic transcription of "buske" would be bʌsk, with the "u" representing the schwa sound and the "k" representing a clear non-aspirated /k/ sound.
The word "buske" originated from the Old Norse word "buskr" (pronounced boosk-ər) which means "bush" or "shrub". This Old Norse term can be traced back to the Proto-Germanic word "buskaz", which also carries the same meaning. Over time, the word "buske" made its way into Middle English and eventually became the modern English word "bush".