The word "cusson" is not a commonly used word in English, and it is not found in the dictionary. However, if we were to phonetically transcribe the pronunciation of "cuss" and add the suffix "-on," the result would be /ˈkʌs.ən/. The vowel sound in "cuss" is pronounced as /ʌ/, while the ending "-on" is pronounced as /ən/. It is important to note that spelling may vary depending on the source of the pronunciation.