This document discusses lexical change and how languages acquire new words over time through various processes. It outlines the main ways that the English language has gained new words, including:
1) Borrowing words from other languages it has come into contact with, such as Latin, French, and Scandinavian languages. This has significantly expanded the English vocabulary over time.
2) Internal processes of word formation within English like compounding, derivation, conversion, clipping, blending, and the formation of acronyms.
3) More recent changes driven by the internet and social media, allowing for new words and meanings to spread more quickly through informal writing. Languages are changing faster than ever before both online and offline.