It is the creation of a new word. It is sometimes contrasted with semantic change, which is a change in a single word's meaning. The boundary between word formation and semantic change can be difficult to define: a new use of an old word can be seen as a new word derived from an old one and identical to it in form. Coinage: The invention of totally new terms is known as coinage. The most typical sources are invented trade names for one company's products which become general terms (without initial capital letters) for any version of that product. For example: nylon, zipper, teflon etc. But after their first coinage, they tend to become everyday words in the language. Borrowing: One of the most common sources of new words in English is the process simply labeled borrowing, that is, the taking over of words from other languages. For example: Alcohol (Arabic) Boss (Dutch) Croissant (French) Lilac (Persian) Piano (Italian) Pretzel (German) Robot (Czech) Tycoon (Japa...