What type of affix changes the meaning of the root word, such as in "unkind"?

Derivation affixes are a type of affix that alters the meaning of the root word to form a new word. In the example "unkind," the prefix "un-" is added to the root word "kind." This prefix changes the meaning of "kind" from a positive attribute to its opposite. Therefore, derivational affixes like "un-" are essential in creating new words and expanding vocabulary by modifying the meanings of the original words.

Inflectional affixes, on the other hand, serve to change grammatical aspects such as tense or number without changing the core meaning of the word. Combining forms typically refer to components used in the formation of compound words or technical terms and do not function as standalone affixes. Suffixes are a broader category that can include both derivational and inflectional types, but in this case, the specific aspect of changing meaning is highlighted, making derivation the most accurate choice.