What are sulfixes?

Answer 1

"sulfixes" is gibberish. -Suffixes means 'affixes' that are added onto the ends of words.

Answer 2

Sulfixes are not a linguistic term. Did you mean "suffixes"? If so, suffixes are affixes added to the end of a word to create a new word or alter the meaning of the original word. They are commonly used in English and other languages to modify the root word.