なんと，20の接頭語と14の重要な語根を含む14語から14,000語以上の単語を類推できる！？ 語源を知ることは多数の単語の意味を類推するのに効果がありそうです．
These words make all the difference because they are supposed to contain the twenty most useful prefixes and the fourteen most important roots and are to be found in over 14,000 words in a collegiate dictionary size or close to an estimated 100,000 words in an unabridged dictionary size. This is according to James I. Brown, Professor of Rhetoric, University of Minnesota; in his Programmed Vocabulary book, printed by Meredith Publishing Company, New York,1971.
【source】
☆Fourteen Basic Prefixes and Roots used in English Vocabulary
☆Word Power
【related】 - 14 Wordsの意味や詳細な解説があります． -
☆1000倍に増える！魔法の14英単語［TOEIC・英語検定］All About Japan