Suffixes and Prefixes
A suffix is a group of letters that goes at the end of a word to change the part of speech.
For example, “to suit” means “to be proper” and is a verb. By adding the suffix able, we make suitable, which is the adjective form.
A prefix is a group of letters that goes at the beginning of a word to change the meaning.
For example, when we add un to suitable, we make unsuitable which means “not proper”.