Morphology is the study of how words are formed
morphemes
A morpheme is the smallest component of a word. For example: “skydiving” has three morphemes, sky, dive, ing.
A morpheme is either a free morpheme or a bound morpheme. Free morphemes are independent, while bound morphemes must be attached to a free morpheme.
An affix is a morpheme that is attaches to a stem to modify its meaning or function. It includes prefixes and suffixes.
An affix is either an inflectional morpheme or a derivational morpheme. Derivational morphemes are morphemes not in the six Inflectional morphemes. Inflectional morphemes have a grammatical function. There are six inflectional morphemes: -s plural, -s possessive, -s third person singular present, -ed past tense, -ing continuous tense, -er comparative, -est superlative.