Merriam-Webster's Vocabulary Builder

Designed to achieve two goals: to add a large number of words to your permanent working vocabulary, and to teach the most useful of the classical word-building roots to help you continue expanding your vocabulary in the future. Greek and Latin have been the sources of most of the words in the English Language. You could find much fun in this book that some of the fashion words are come from an elegent sources dated back to thousands of years. Also, you could enjoy the infinite discovery through reading it, which is not merely a dictionary, but a wonderful educational and enlightening book.