How to remember vocabulary long-term: the science of making words stick

TL;DR: The most effective way to remember vocabulary long-term is to repeatedly retrieve
words from memory, revisit them at spaced intervals, and encounter them in meaningful
contexts. While reading a word list helps boost your vocabulary, active recall helps you
memorise these words. Listening to the words in natural speech, and using them in phrases,
makes them even easier to remember.

While forgetting vocabulary can seem frustrating, there are ways to improve your memory.
These practice methods help you recognise words and use them in conversations. Through
repeated retrieval and use in different contexts, the memory becomes readily accessible.


Why do you keep forgetting vocabulary?

You forget vocabulary partly because your memory weakens from not retrieving the
information often. There is a difference between seeing a word again and remembering it
without being shown the answer. It is easy to remember ‘casa’ means house when you read
it repeatedly. However, it might be challenging to retrieve the word without seeing it.

Most language learners read words and understand without trying to recall from memory.
They get a misleading sense of progress because recognition feels like knowing, but
conversations and writing require recall. It can be difficult to get involved in conversations
because words don’t come easily.

Jeffrey Karpicke and Henry Roediger gave students 40 Swahili–English word pairs to learn
and reported in 2008 on Science.org that the students who kept retrieving the pairs recalled
about 80% of them a week later against 36% and 33% for the groups that were dropped
from repeated testing and kept restudying instead. Testing yourself is both a method of
progressing and measuring your development.


WWhat is spaced repetition and why does it work?

Spaced repetition entails retrieving information at intervals rather than learning it in one
session. This means encountering a word again and again after long intervals rather than
studying a new word repeatedly in one session. The exact schedule can vary from person to
person.

The largest review of distributed practice, published by Nicholas Cepeda and colleagues in
Psychological Bulletin in 2006, pooled 839 assessments from 317 experiments and found
that spreading study sessions out reliably beat packing them together. Retrieval-practice
research such as the Karpicke and Roediger experiment above answers a different question:
not when you review, but what you do during the review. These two principles are closely
related but are not identical: spacing determines when you review, while retrieval determines
what you do during the review.

The distinction between the two matters because seeing a word after a long interval is not
the same as trying to remember the answer first. Memrise leverages spaced repetition to
help learners remember vocabulary. The system schedules reviews at increasing intervals,
so vocabulary moves into longer-term memory.


Different approaches to remembering vocabulary

The table below sets out the five approaches learners reach for most often, what each one
involves in practice, and where each tends to fall short. They are not mutually exclusive, and
the last two are the ones worth building a routine around.

There is no perfect approach to remembering vocabulary for any particular learner. One
study session will not make recall permanent, and learners should return to vocabulary
repeatedly. They can use all the above techniques to boost their recall.


How does retrieval practice make vocabulary stick?

Instead of constantly exposing yourself to vocabulary, retrieval practice helps you
reconstruct vocabulary from memory. Suppose you learn the Japanese word ‘taberu’,
meaning ‘to eat’. A good retrieval exercise is to ask yourself how you say ‘to eat’ in
Japanese. This means you search for the word in memory and produce a suitable answer.

Once you retrieve a word successfully, it becomes easy to remember in the future. If you
can’t remember it, go back to the reading list and learn it again. It does not mean that your
technique is wrong; it allows you to relearn.

Flashcards are a useful tool when they have more than just the answer. They should give
you time to recall the answer before revealing it. This helps you practise more, improving
your vocabulary.

The same 2008 Science experiment showed this clearly: once a word had been recalled
correctly, carrying on testing it lifted week-later recall to around 80%, while carrying on
studying it added almost nothing. The practical lesson is to treat a test as part of learning
rather than as a measurement of it.

The practice extends beyond the use of flashcards. You can retrieve vocabulary by
describing a photograph, translating a short phrase, and answering a question. Always try to
remember a word before checking your notes.


Should you learn words in context?

Yes. A translation tells you what a word means, but context tells you how the same word
behaves. For instance, the English word ‘fire’ changes meaning depending on the sentence.
Language learners should understand that words have different meanings depending on
context. Learning a translation without seeing how it functions can leave you with knowledge
that is difficult to use. Context shows you the following things:

● Which words commonly appear together
● How native speakers use a word
● How a word changes in different sentences
● What grammatical structure surrounds a word
● Whether an expression is formal or informal

This does not mean that every vocabulary item needs a lengthy explanation. You simply
need a short phrase to gain additional information about a word. This makes it more
meaningful, which helps with recall.

For example, learning a word alongside a useful sentence gives you more to remember. You
get to attach it to other phrases, which boosts retention. The surrounding phrase will later act
as a retrieval clue.


Can listening help you remember vocabulary?

Yes. Listening gives vocabulary another form of context. A word you encounter in writing
feels unfamiliar when you first hear it. However, you will soon learn to connect it with its
meaning when you hear it repeatedly.

Listening also exposes you to a vital component of language learning—pronunciation. It
helps you understand how the word sounds and functions in connected speech. This matters
because vocabulary knowledge is not limited to recognising a written translation.

Memrise uses short videos featuring native speakers as part of its learning experience.
Learners learn new words and phrases through real people. This boosts recall compared to
only writing the word or listening to robotic recordings.

Remembering vocabulary in isolation is different from recognising it when used naturally in a
conversation. Learners should aim to listen to words in meaningful contexts to improve their
recall ability. This gives the words more associations that can help you recognise and use
them.


What is the best way to remember vocabulary long-term?

Using a combination of active recall, spaced reviews, meaningful context, and regular
exposure helps you remember vocabulary long-term. A practical vocabulary routine might
look like this:
1. Learn a new set of words - focus on vocabulary relevant to what you want to say and
understand
2. Try to recall each word - use prompts to produce answers before confirming it
3. Review the words again later—have different sessions spread throughout a long
period
4. Encounter the words in context - read sentences and phrases rather than relying on
isolated translations only
5. Listen to the words - hear native speakers to help you connect vocabulary with its
spoken form
6. Use the words yourself - write sentences, answer questions, and speak aloud using
newly learned vocabulary
7. Return to older vocabulary - new words should not replace old ones; constantly go
back to reassess old vocabulary

This combination helps you tackle several parts of vocabulary knowledge at once. It helps
you identify words and remember them in real time. You can also understand them and use
them effectively

Frequently asked questions

What is the best method for remembering vocabulary long-term?
The strongest approach combines retrieval practice with spaced review. Try to recall words
without seeing them rather than repeatedly rereading vocabulary. It also helps to revisit them
across separate sessions. Adding meaningful phrases, listening, and active use gives each
word more context and creates more opportunities to retrieve it.

Why do I forget vocabulary so quickly?
A word can feel familiar when you read and write it repeatedly. However, this tactic does not
give your memory enough opportunities to retrieve it. Regular recall, spaced review, and
using words in context can make vocabulary easier to access later.

Is it better to learn vocabulary in sentences?
Usually, yes. A sentence tells you things a translation cannot: which words the target word
normally appears with and whether it belongs in formal or informal speech. It also gives you
a second route back to the word, because the phrase itself becomes a retrieval clue. You do
not need a long example, and a short, useful sentence you would actually say is enough

How many times do you need to repeat a word to remember it?
There is no reliable number of repetitions that will ensure permanent retention. Memory
depends on how difficult the word is, how well you understand its meaning, and whether you
can actively retrieve it. Isolated vocabulary is the first step to learning a new language and
helps learners grasp basic terms.

Does writing vocabulary down help you remember it?
Writing supports learning, particularly when it requires you to actively recall and use a word.
Simply writing a word repeatedly is less demanding than producing it from memory. It helps
to write original sentences because it is more useful than copying a vocabulary list without
testing yourself.