Prefixation in the English language and its role in enriching the English vocabulary

Introduction……….3     Chapter I. Word-formation and its basic peculiarities………5  1.1. Affixation in the English language……7  1.2. Degree of derivation…….7  1.3.Homonymic derivational affixes………18     Chapter II. Prefixation in the English language……28  2.1. Prefixation. Some debatable problems…………28  2.2. Classification of prefixes………33  2.3. Productive and non-productive word building prefixes………41  2.4. Some prefixes in the English language in comparison with the Uzbek language……52     Conclusion………57  The list of used literature………61