Affix
From TEFL World Wiki
An affix is a morpheme that is attached to a root (or stem) to form a word.
Prefixes and suffixes are common types of affixes.
A prefix is an affix which is placed before a root.
un + kind = unkind
re + act = react
mis + lay = mislay
A suffix is an affix which is placed after a root.
reason + able = reasonable
look + ing = looking
danger + ous = dangerous
