English words and prefixation

This paper deals with something that is very important in our lives and is always present and ready to help but we usually don't pay our attention to it. Those are words and what has already been said really happens, but if we try to identify the words from the point of view of any science and using the appropriate methods, we would discover different criteria and characteristics of words. From the point of view of linguistics, words are basic units to some degree, the smallest, and from the point of view of meaning, abstract. But basically, they are minimal free units with their structure and they express meaning. Words are parts of a language so the identification and the description of them cannot be done without a short review of what is language. The same happens with English words. In order to get a precise idea about English words, both diachronic and synchronic methods are applied. One of the biggest sources of producing new words in English, words formation process is involved, as an example; a process of prefixation is described. The main goal of the paper is to reveal some new ideas about English words and represent a new approach to words in the process of learning English as a foreign language