New words are formed through various processes to describe new inventions and concepts. The main word formation processes are coinage, borrowing, calque, compounding, derivation, blending, backformation, conversion, acronyms, initialisms, onomatopoeia, and clipping. Borrowing incorporates words from other languages while calque is a word-for-word translation. Compounding combines words and derivation adds prefixes and suffixes. Blending fuses parts of multiple words. Backformation changes word classes and conversion alters categories. Acronyms use initials and initialisms spell words letter by letter. Onomatopoeia mimic sounds and clipping shortens words. Language evolves through these creative word formation processes