a bound morpheme is a morpheme (the elementary unit of morphosyntax) that can appear only as part of a larger expression
A bound morpheme is a type of bound form
free morpheme (or unbound morpheme) is one that can stand alone
free morpheme is a type of free form
Words like chairman that contain two free morphemes (chair and man) are referred to as compound words
root morpheme
Free morphemes can function independently as words (e.g. town, dog) and can appear within lexemes (e.g. town hall, doghouse).
Bound morphemes appear only as parts of words, always in conjunction with a root and sometimes with other bound morphemes.
Cranberry morpheme
Zero-bound-morpheme
Derivational bound morphemes
Derivational morphemes, when combined with a root, change the semantic meaning or the part of speech of the affected word.
from an adjective (happy) to a noun (happiness)
-tion, -sion, -tive, -ation, -ible,
Inflectional bound morphemes
Inflectional morphemes modify the tense, aspect, mood, person, or number of a verb or the number, grammatical gender, or case of a noun, adjective, or pronoun without affecting the word's meaning or class (part of speech).
-ing.
functional morphemes, also sometimes referred to as functors