Morphology is the study of word structure and formation. It examines how morphemes, the smallest units of meaning, combine to create words with different meanings and functions. This field is crucial for understanding language acquisition, processing, and evolution. Morphology encompasses two main processes: derivation and inflection. Derivation creates new words by adding affixes to roots, often changing meaning or grammatical category. Inflection modifies words to express grammatical relationships without altering core meaning or category.