A prefix is an affix which is placed before the stem of a word.[1] Adding it to the beginning of one word changes it into another word. For example, when the prefix un- is added to the word happy, it creates the word unhappy. Particularly in the study of languages, a prefix is also called a preformative, because it alters the form of the words to which it is affixed
Context clues are hints that an author gives to help define a difficult or unusual word. The clue may appear within the same sentence as the word to which it refers, or it may follow in a preceding sentence
Suffixes are word endings that add a certain meaning to the word.
