词根背单词 (Root Word Vocabulary) is an educational app designed to help users improve their English vocabulary by focusing on word roots. Many people struggle with remembering English words, often forgetting them soon after memorizing. This app aims to address this issue by teaching users the essence of words - their roots and affixes.

The app features a selection of 500 commonly used word roots and affixes, along with over 5,700 related words. By mastering these word roots, users can expand their vocabulary exponentially. The app also includes a wide variety of tests, such as meaning tests, pronunciation tests, spelling tests, English definition tests, and example sentence tests, to reinforce learning.

In addition, the app offers a built-in dictionary with over 130,000 words, allowing users to easily look up unfamiliar words even when offline. It also provides integration with Bing Dictionary for comprehensive word definitions. Users can add unfamiliar words to their personal vocabulary list by long-pressing on them in example sentences, further enhancing their word knowledge.

With the ability to create unlimited vocabulary lists and import/export them via wireless network, 词根背单词 provides a comprehensive and efficient way to learn and retain English vocabulary.