itussuffixistä
Itussuffixistä is a hypothetical concept, not a recognized term in linguistics or any other established field of study. As such, there is no established meaning or usage associated with "itussuffixistä". If this term appears in a specific context, its meaning would be entirely dependent on that context.
In linguistics, suffixes are morphemes added to the end of a word to form a new word
It is possible that "itussuffixistä" is a neologism, a newly coined word, or perhaps a misspelling of