Morphological processes refer to the ways in which words are formed and modified in a language. These processes include the addition of prefixes and suffixes, which can change a word's meaning or grammatical function. For example, adding the prefix un- to the word happy creates the opposite meaning, resulting in unhappy. Another key aspect of morphological processes is inflection, where words change form to express different grammatical categories such as tense, number, or case. For instance, the verb walk can be inflected to walked to indicate past tense. These processes are essential for understanding how languages structure and convey meaning.