About
Words are made of roots
English words are not random strings. They are built from reusable roots and affixes that appear again and again across thousands of words. The Missing Workbook is designed around that idea.
What The Missing Workbook Means
The Missing Workbook is the workbook you wish your English class had given you — the missing companion to a plain dictionary. A dictionary tells you what a word means today; the workbook shows you where it came from and how it connects to everything else you know.
Our job is to be the map of that vocabulary. At the center of The Missing Workbook is the Etymology Atlas — a recursive graph that breaks every word into its Latin and Greek roots and affixes, layer by layer. Move through shared parts. Discover the relationships.
Try it with a rich word
Built for Deep Understanding
- → Recursive etymology. Explore how words are assembled from Latin and Greek roots and reusable affixes, layer by layer.
- → Interconnected learning. Words, phrases, pronunciations, and roots are linked together so learning happens through context and relationships — not isolated flashcards.
- → Memory heatmaps. See at a glance which areas of your vocabulary are strong and which need reinforcement.
- → Study desks + spaced repetition. FSRS-5 (the 2024 algorithm) blended with SM-2, tuned for long-term retention rather than streak-chasing.
- → CEFR-based lessons. Follow a clear progression from A1 foundations through C2 mastery. Quiz sessions hosted by Mizuki Sensei.
- → IPA pronunciation. Learn US and UK pronunciation patterns alongside meaning.
The Numbers
What The Missing Workbook Is Not
- Not a complete curriculum. Use it alongside a textbook, a tutor, or another app — it's the reference and structure layer, not the syllabus.
- Not a replacement for grammar study or immersion. Vocabulary is one piece of English — not the whole thing.
It works best once you already read English at a basic level.
What The Missing Workbook Is
- → A structural map of English vocabulary
- → A visual reference for understanding how words are composed
- → A study environment focused on relationships and retention
- → A tool for serious learners who want to go beyond memorization
You can start studying A1 vocabulary after becoming a member.