iRootWord: English Word Roots

Learn one root, unlock a family of words. iRootWord: root dictionary, offline decomposer, smart review, word lists and share cards. No sign-up. Offline. Privacy first.

iRootWord - Learn one root, unlock a whole family of words.

Tired of memorizing vocabulary that fades overnight? iRootWord uses morphology to turn scattered words into a connected knowledge map. Learn one root, and you can understand, guess, and remember an entire cluster of related words. It is an English root-and-affix dictionary and study companion, deeply integrated with Apple platforms, fully usable offline, with no ads and no tracking.

Many learners remember today and forget tomorrow, then cram before exams and start over. iRootWord takes a smarter path: master the building blocks first, then expand into related vocabulary. Once you see how roots, prefixes, and suffixes combine, long words become structures you can decode, infer, and retain.

Root and Affix Dictionary

• 240+ high-frequency prefixes, roots, and suffixes
• Chinese glosses, etymology, variants, and memory tips
• 700+ real example words with morphological breakdowns
• Long-press detail text to copy, translate, speak, or share
• Generate beautiful root share cards for classmates or friends

Word Decomposer

• Split any English word into roots and affixes instantly offline
• Segment-by-segment Chinese explanations, with jumps to matching entries
• Decode unfamiliar words while reading, practicing, or writing
• Works without a network connection

Browse by Category

• Explore by semantic theme, language of origin, and affix type
• Exam collections for CET-4/6, postgraduate exams, IELTS/TOEFL, and GRE
• List, grid, and card layouts with adjustable columns
• Study by theme, or sprint with exam-focused sets

Root of the Day

• One high-frequency root each day for a steady rhythm
• Refresh anytime; prefers roots not yet learned or mastered
• Stays in sync with Home Screen widgets for the same day

Smart Review

• Flashcards and multiple-choice modes
• Leitner spaced repetition based on the forgetting curve
• Undo the last grade if you tap too soon
• Start targeted review from favorites or custom word lists
• Study stats and streaks make progress easy to see

Search, Favorites, and Word Lists

• Search roots, affixes, and words with summaries, phonetics, and linked roots
• Favorite, pin, search, and multi-select in list, grid, or card layouts
• Group by pinned items or type; sort by date, form, or frequency
• Create custom lists by exam, topic, or personal plan
• Batch add, batch unfavorite, and review selected items in one tap
• Open favorites and lists quickly from Home

Deep Apple Integration

• Widgets: Root of the Day (refreshable), Hourly Root, Review Progress, Favorites Glance on Home Screen and Lock Screen
• Control Center: start review in one tap on iOS 18 and later
• Siri and Shortcuts: Root of the Day, decompose a word, start review
• Spotlight: jump straight to any root from system search
• Home Screen Quick Actions for frequent tasks
• Optional iCloud sync for favorites, word lists, and progress (off by default)

Pronunciation

• American and British English speech

Personalization and Ease of Use

• Multiple alternate app icon styles
• Light and dark themes, flexible layouts, Dynamic Type, and accessibility support
• Built-in guides for usage, widgets, and Shortcuts
• Interface in English, Simplified Chinese, and Traditional Chinese

Built for Every Apple Device

• Universal for iPhone, iPad, Mac, and Apple Vision Pro
• One study system across the devices you already use

Privacy First

• Dictionary fully built in; core features work offline
• No account, no personal data collection, no ads, and no tracking
• iCloud sync stays optional and off by default

Whether you are preparing for CET, postgraduate exams, IELTS, TOEFL, or GRE, or simply want a more systematic way to grow vocabulary, iRootWord helps you remember more efficiently and more lastingly. Start with roots, and build transferable vocabulary power.

Start today. Learn words through roots.