 Conversion, also known as zero derivation, is the type of word formation in which the category and the function of a word change without any reduction. Bill Waterson coined the phrase, verbing weird's language in his daily comic strip, Calvin and Hobbes. This quote demonstrates the conversion of the noun, verb, and the adjective, weird. The most productive conversion process in the English language is noun to verb, or verbification. Some examples are as follows. I can send someone an email, but I can also email someone. I can search Google, or I can Google something. And instead of adding you as a friend, I can friend you. Another productive process in English is verb to noun, or nominalization. If I guess something, this something is a guess. I can spy on someone, and I am therefore a spy. Less common forms are the nominalization of phrasal verbs, the conversion of verbs to adjectives, and even forms where function words are converted to nouns. Conversion is present in other languages, but it is not deemed zero derivation as they involve changes in the word form. In Esperanto, for example, any word can be changed into a verb by altering its ending or adding suffixes. And in Hebrew, and other Semitic languages, the internal vowels are changed. And with that, I think you'll all agree that verbing does indeed weird language.