Term: Affixes

An Affix is a Morpheme added to a word to change its function or meaning. There are three basic ways to do this:

Prefix - by adding a morpheme to the beginning of a word:

Possible can be made negative in meaning by adding im-: impossible

Suffix - by adding -ly to the end of many adjectives, the adverb can be formed: cheerful- cheerfully

Infix - some languages add morphemes to the middle of the word, but this system is rarely used in English, except in expressions such as 'Fan-bloody-tastic', known as tmesis .