What is morphology?
the study of word structures and the rules by which words are formed
Word
the combination of sounds (a spoken word) or letters (a written word).
Content words (open class)
Nouns, verbs, adjectives, and adverbs, they are called content words because they have meaning.
Function words or closed class
Prepositions, conjunctions, and pronouns, identify grammatical relationships and don’t have meaning