word-roots

词源英语OpenEtymology：英语词源、词根、词缀单词本，覆盖 CET4/CET6/TEM8/TOEFL/GRE，提供 PDF/EPUB/TXT。English vocabulary wordbooks with etymology, word roots, prefixes and suffixes.

这不是一本词根词缀的清单,而是一部探究"为什么"的故事书。每一个词根、每一个词缀的引入,都要回答一个问题: 它从哪里来?它经历了什么?它为什么长成今天这个样子?

Learn English vocabulary through word roots and etymology

Create narrated radial vocabulary and word-root videos with customizable layouts and multilingual TTS. 词根与词缀放射视频制作工具，支持自定义布局、多语言朗读和 MP4 导出。

Decode roots, master words

A Codex skill for learning English words through etymology, roots, and visual semantic chains

🎰 词根老虎机 RootSlots — 用构词法背完 14653 词的离线 Android 单词机 | 动态段轴老虎机 · 艾宾浩斯 SRS · 好友PK异步战书(离线) · 离线神经美音 · 7 考试池

Type an English word and see how it was built — roots, prefixes, suffixes and related forms. Offline-installable PWA for English learners.

English learning notes: pronunciation, word roots, grammar and tenses, with topics and past exam papers.