Looking more closely at the preceding group of words, we can see that some affixes have to be added to the beginning of the word (e.g. un-, mis-). These are called prefixes. Other affixes have to be added to the end of the word (e.g. -less, -ish) and are called suffixes. All English words formed by this derivational process have either prefixes or suffixes, or both. Thus, mislead has a prefix, disrespectful has both a prefix and a suffix, and foolishness has two suffixes.