This document discusses the various word formation processes including derivation, back formation, conversion, compounding, clipping, blending, abbreviation, acronyms, and borrowing. Derivation attaches affixes to base words to create new words. Back formation removes affixes. Conversion changes a word's part of speech. Compounding combines words. Clipping shortens words. Blending combines parts of multiple words. Abbreviation shortens words or phrases. Acronyms form words from initials. Borrowing adopts words from other languages. Understanding these processes helps expand vocabulary.