This article is part of our English Vocabulary Learning Hub — explore word lists, idioms, phrasal verbs, and more.
You study a list of twenty new English words. By the next morning, half are gone. By the end of the week, almost all of them have vanished. Sound familiar? This is not a memory problem — it is a method problem. The good news is that memory researchers have spent more than a century identifying exactly what makes vocabulary stick. This guide brings together those findings in practical, immediately usable techniques.
Why Passive Reading Fails: The Forgetting Curve
In the 1880s, the German psychologist Hermann Ebbinghaus conducted the first rigorous experiments on human memory. He discovered what we now call the forgetting curve: without any review, we forget roughly 50% of new information within an hour, around 70% within 24 hours, and close to 90% within a week.
The implication for language learners is stark. Simply reading a word list, watching a video, or highlighting new vocabulary in a textbook creates only a shallow memory trace. Your brain treats passive exposure as low-priority information and prunes it quickly. To remember new English vocabulary reliably, you need strategies that force your brain to retrieve the information repeatedly — and to do so at the right moments.
Every time you successfully recall a word, you strengthen its memory trace. The struggle to retrieve something — even if it takes a few seconds — is more valuable than reading the answer immediately. Psychologists call this the testing effect or retrieval practice.
Spaced Repetition System (SRS): The Most Powerful Technique
Spaced repetition is the practice of reviewing information at increasing intervals just before you would forget it. Instead of reviewing everything every day (which wastes time on words you already know), an SRS schedules each word individually based on how well you recalled it last time.
How it works in practice
Imagine you learn the word resilient today. You remember it easily tomorrow, so the system schedules your next review in three days. You remember it then, so the next review is in a week. Then two weeks. Then a month. Each successful recall pushes the next review further into the future — your brain is allocating permanent storage to the word. If you forget it at any point, the interval resets and you start rebuilding the memory trace.
Your own spaced review schedule
You do not need an app to use spaced repetition. A simple notebook system works well. After learning a new batch of words, review them according to this schedule:
| Review | When | Purpose |
|---|---|---|
| Review 1 | Same day (evening) | Encode the initial memory |
| Review 2 | Day 3 | Reinforce before first significant forgetting |
| Review 3 | Day 7 | Move to medium-term memory |
| Review 4 | Day 14 | Consolidate into longer-term storage |
| Review 5 | Day 30 | Transfer to near-permanent memory |
Words that you recall correctly at every interval can be considered learned. Words you struggle with stay on the shorter intervals until they strengthen.
The Keyword / Mnemonic Method
The keyword method is one of the most researched vocabulary learning techniques and consistently outperforms rote repetition in studies. The idea is simple: link the new word’s sound to a vivid mental image connected to its meaning.
Three steps to create a keyword memory
- Find a keyword: Choose a word in your own language (or in English) that sounds like part of the new word.
- Create an image: Form a memorable, even absurd, mental picture that connects the keyword sound to the word’s meaning.
- Practise recall: When you hear or see the new word, the sound triggers the image, which triggers the meaning.
Example: The English word frugal (meaning careful with money; not wasteful).
Keyword: frugal sounds a little like froog (frog). Image: picture a frog sitting at a bank counter carefully counting coins. Every time you see frugal, the frog image fires — and so does the meaning.
The more unusual or funny the image, the better it sticks. Your brain is wired to prioritise novelty and emotion over neutral information.
Learning Words in Context, Not in Isolation
One of the most reliably damaging habits in vocabulary study is learning words as isolated translations: negotiate = verhandeln. This approach tells you almost nothing about how the word is actually used — its register, its collocations, the grammatical patterns it appears in. Research consistently shows that words learned in sentences and short texts are retained roughly twice as well as words learned in isolation.
What good context looks like
When you record a new word, always capture at least one example sentence from real use — from a book, article, or conversation. The sentence should show the word doing its job in a natural grammatical pattern.
Weak (isolation): negotiate = to discuss in order to reach an agreement
Strong (context): The union negotiated a 5% pay rise with the management after three rounds of talks.
The context shows you: verb + object pattern, common collocations (negotiate a deal / pay rise / contract), and typical subject types (organisations).
The Output Principle: You Must Use Words to Remember Them
Reading and listening build your passive vocabulary — words you can recognise. But to move a word into your active vocabulary — words you can use spontaneously in speech and writing — you must produce it yourself. This is called the output hypothesis, developed by linguist Merrill Swain.
Practical ways to activate vocabulary include:
- Writing your own example sentences for new words — not copying from a dictionary.
- Using new words in conversations, even if it feels forced at first.
- Keeping a journal in English and deliberately using recently learned words.
- Doing interactive retrieval exercises such as Flash Cards and Match Up where you produce the word, not just recognise it.
A useful self-test: can you use the word in a sentence without looking at the definition? If not, it is still passive. Keep producing it until it flows naturally.
Chunking: Collocations and Word Families
Native speakers do not store words one by one — they store chunks: common two- and three-word combinations (collocations) that appear together so often they function as single units. Learning vocabulary this way dramatically speeds up fluency because you are acquiring ready-made phrases, not just individual words.
Collocations
A collocation is a pair or group of words that frequently appear together and sound natural to native ears. When you learn a new word, always ask: what does it typically go with?
make a decision / a mistake / progress / a profit / an effort
take responsibility / a risk / advantage / action / a break
heavy rain / traffic / smoker / sleeper / accent
Word families
Learn a root word and you immediately unlock its family: decide → decision → decisive → indecisive → decisively. One learning investment yields five or six usable words. When you record a new word, briefly note related forms (noun, verb, adjective, adverb, negative prefix).
Vocabulary Notebooks: A Format That Actually Works
The classic student mistake is writing only the translation. A well-structured vocabulary entry gives your brain multiple hooks to hang the word on. Use this six-field format:
Sample vocabulary notebook entry
The personal link field is especially powerful. Any connection to your own emotions, experiences, or memories creates a much stronger encoding than an abstract definition.
Multisensory Learning: See + Hear + Write + Speak
Each sensory channel you engage creates an additional pathway to the same memory. A word you have only read is accessible via one route; a word you have read, heard aloud, written by hand, and spoken yourself is accessible via four routes — making it far harder to forget.
- See: Read the word in multiple texts and contexts.
- Hear: Look up the pronunciation in a dictionary with audio. Listen to podcasts and audiobooks at your level.
- Write: Write the word by hand in your vocabulary notebook — physical writing engages different memory systems than typing.
- Speak: Say the word out loud when you record it. Practise using it in sentences you say to yourself or a study partner.
LexFizz exercises like Flip Tiles and Word Search combine visual recognition with active recall, adding another sensory dimension to your study.
How Many Words to Learn Per Day?
Research on vocabulary acquisition suggests an upper limit of 10–20 new words per day for learners who intend to actually retain them. Attempting to learn more without adequate review leads to interference — new words overwrite recently learned ones.
Quality always beats quantity in vocabulary learning. Ten words learned deeply — with context, collocations, and spaced review — will still be in your memory in six months. Fifty words skimmed through a list will largely be gone by the weekend.
For most learners, a sustainable rhythm is: learn 10 new words in the morning, review yesterday’s batch, and do a quick spaced review of last week’s words. This takes around 20–30 minutes and produces compounding results over time.
How Many Exposures Does It Take?
Vocabulary researchers estimate that a word needs to be encountered approximately 7–15 times in varied contexts before it moves reliably into long-term memory. A single dictionary lookup does not come close. This is why extensive reading, where you encounter words across different texts, is so powerful for intermediate and advanced learners — it naturally provides those repeated exposures.
Interactive exercises accelerate this process because each exercise is an active encounter with the word — not just passive recognition but recall under mild pressure, which strengthens the memory trace significantly more than passive re-reading.
Free Tools: LexFizz Flash Cards with URL Loader
LexFizz’s Flash Cards exercise supports a URL loader feature that lets you create and share custom vocabulary decks. You can build a deck from your current vocabulary notebook, share the URL with a study partner or class, and practise the same set of words together. The flash card format forces active recall — you see one side and must retrieve the other — making each session far more effective than passive reading.
For variety, use Match Up to connect words and definitions by dragging, or Flip Tiles for a memory-game format that tests pairs. All exercises work on mobile with no sign-up required.