This document discusses various ways that languages can increase their vocabulary through processes like affixation, reduplication, compounding, shortening, acronyms, blends, back formation, semantic shift, and inventing new words. It provides examples for each process, such as adding prefixes and suffixes to create new words, repeating parts of words in reduplication, combining words to form compounds, shortening words, creating acronyms, blending parts of words, creating new verbs from nouns in back formation, extending meanings through semantic shift, and Dr. Seuss inventing the word "nerd".