The Affixation reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Affixation

Time you got around to sponsoring a child

Affixation occurs when a Bound morpheme
attaches to a Root morpheme.
Types of Affixes
Prefix:morpheme+root
exampleundo
Suffix:root+morpheme
exampleruning
Infix*:root+morpheme+root
exampleabsofrigginlutely
circumfix**: mor+root+pheme

examplegesprecht
*English infixes only exist in exclamatory cunstructions like the example given
**English circumfixes do not exist, the example given is the german form for "spoken"

see also Bound morpheme, Root morpheme, Free morpheme