Is the word neglectful a prefix or suffix?

"Neglectful" is formed by adding the suffix "-ful" to the root word "neglect".

Here's why:

* Prefixes are added to the beginning of a word, like "un-", "re-", or "pre-".

* Suffixes are added to the end of a word, like "-ful", "-ness", or "-ing".

So, "-ful" in "neglectful" is a suffix that indicates "full of" or "characterized by".