Example:
phone = fore-clipping of telephone
bro = back-clipping to form a more informal version of brother
fridge = fore- and back-clipping of refrigerator
Back-formation is a slightly more complex type of word-formation process as it involves removing something which is not actually present. In this process we can see how analogies work to change the language, as something which is considered an affix (on the basis of other lexemes) is dropped to create a new lexeme.