・The most efficient way to learn English words is to learn the etymology.
・With this app, you can memorize words by associating them based on their etymology.
・English words are made up of the formula "prefix + root + suffix".
・It has been proven by etymology research that you can acquire a 10,000-word level vocabulary through the power of etymology. (The average word count for native speakers is 30,000 words, and 6,000 words are required to pass the entrance examination to the University of Tokyo.)