The document discusses various word formation processes including compounding, blending, back formation, affixation, and meaning change. It provides examples for each process. Compounding involves combining two or more free morphemes to form a new word like blackbird. Blending joins parts of different words like smog from smoke and fog. Back formation removes what is mistakenly considered an affix like peddle from peddler. Affixation adds a bound morpheme through prefixation, suffixation, or infixation. Meaning change alters a word's semantic meaning through processes like generalization or metaphorical extension.