Tap any card to flip it. Filter by category, mark words you know, and track your progress as you go.
These flashcards cover the four core areas of the Vocabulary Building series: prefixes & roots, synonyms & antonyms, idioms & phrases, and formal vs. informal English. Your progress is saved automatically in this browser.
1. Tap any card to flip it and reveal the meaning, an example sentence, and extra detail (like a synonym, antonym, or prefix breakdown).
2. Use the category buttons (All Words, Prefixes & Roots, Synonyms & Antonyms, Idioms & Phrases, Formal vs. Informal) to focus on one area at a time.
3. When you're confident with a word, tap "Mark as Known" on the back of the card — it's saved automatically, even if you close the page.
4. Use "Hide Known" to see only the words you're still learning, or "Shuffle" to mix up the order for extra practice.
5. Once you've worked through the cards, try the quiz below to test how much you've remembered.
A flashcard works best when you try to remember the answer before you flip the card. That small effort of recalling is what helps a word stay in your memory. Simply reading the meaning again and again helps much less.
Say what you think it means. Flip the card: "truthful and straightforward". Read the example about a candid answer on project risks. Now write your own: "I asked my teacher for a candid opinion about my essay." Mark it as known only after you have used it once in speech or writing, and check it again the next day.
Your progress is saved in this browser on this device only. If you clear your browser data or use another phone, it will start again from zero.
Activity: ask each learner to choose five words they are unsure about and write one sentence for each. Then they swap sentences with a partner, who checks that each word is used correctly. The quiz below uses ten of the words that appear on the cards.
10 questions. Select an answer for each, then submit to see your score instantly.