4 Answers

An affix is a morpheme that is attached to a word stem to form a new word. Affixes may be derivational, like English -ness and pre-, or inflectional, like English plural -s and past tense -ed. They are bound morphemes by definition; prefixes and suffixes may be separable affixes. Affixation is, thus, the linguistic process speakers use to form different words by adding morphemes (affixes) at the beginning (prefixation), the middle (infixation) or the end (suffixation) of words.

Positional categories of affixes

Affixes are divided into plenty of categories, depending on their position with reference to the stem. Prefix and suffix are extremely common terms. Infix and circumfix are less so, as they are not important in European languages. The other terms are uncommon.

Source:  WIKIPEDIA

Root word:  like

Affixes:   DISlike    UNlikeABLE   likeNESS  likeLY   

See here >>>http://www.ruf.rice.edu/~kemmer/Words/rootaffix.html

duplicate answer. sorry

Word root is what is left after affixes are removed. Affixes are additions to word roots, such as the addition of the suffix 'un' to the root 'do': undo.