A bound morpheme can only occur in connection with other morphemes Example: -s, -ion, un-, -ize
A bound morpheme is a prefix or suffix, which cannot stand as a word in its own right, but which, can be attached to a free morpheme and modify the meaning of the free morpheme For example, "happy" is a free morpheme, which becomes "unhappily" when the prefix "un-", and suffix "-ly", both bound morphemes, are attached
a morpheme that occurs only as part of a larger construction; eg an -s at the end of plural nouns