Affixation is a process that adds prefixes or suffixes to root words to create new words or different forms of existing words. Prefixes are added to the beginning of root words while suffixes are added to the end. Affixation can be either inflectional, which adds grammatical information without changing the word's meaning or class, or derivational, which always changes the word's meaning and can change its class. Common examples of affixation in English include adding suffixes like "-s", "-ed", or "-ing" or prefixes like "un-", "im-", or "dis-".

1. Affixation
By: Didik Rahmansyah

2. Affixation is a process of adding a morpheme
(or affix) to a word to create either:
a. a different form of that word
b. a new word with a different meaning
 Prefix (at the beginning of the root word)
 Suffix (at the end of the root word)
Inflectional Derivational

3. Most English words are made up of the base word
known as root (base form).
Prefix Root Word Suffix New Word
Dis- advantage ous disadvantageous
Un- help ful unhelpful
Un- forgive able unforgivable
Im- measure able immeasurable

4. Suffix
 Inflectional
 Does not change the meaning/word class
 Add grammatical information (past,
present, participle, plural)
play plays playing played
book books

5.  Derivational
 Always changes the meaning
 May changes the class of the root word
Write Writer
V N
Likely Unlikely
Adj Adj

6. Thank You…
References:
http://grammar.about.com/od/ab/g/Affixation.htm
www.ajol.info/index.php/afrrev/article/download/41010/8450
https://www.youtube.com/watch?v=GdrgdVgmX28