This document discusses morphemes, which are the smallest units of meaning in language. It provides examples of words that can and cannot be divided into multiple morphemes. Most words contain more than one morpheme. Morphemes can be free-standing or bound within words. Certain bound morphemes called derivational morphemes can change the grammatical category or meaning of words. Examples are provided of derivational morphemes that change nouns into adjectives or verbs. The document also distinguishes between morphemes and syllables.