So as you can see, affixes can dramatically change the definitions of words. Knowing the various prefixes and suffixes along with their meanings can really help you to understand how words are used, and also how they should be spelt.
Although these groups of letters (affixes) are important and assist with forming words, they are not words in their own right and cannot stand alone in a sentence.
If they are printed or written alone, then they should have a hyphen before or after them to demonstrate that they are to be attached to other letters to form words (the way I have listed them in the above tables).