Have you ever learned a new English word, felt confident about it, and then completely forgotten it a few days later?

If so, you are not alone. Many English learners believe they have a bad memory or that they are simply not good at learning languages. However, forgetting is actually a normal part of how our brains work. The real challenge is not avoiding forgetting completely, but finding ways to make new vocabulary easier to remember and easier to use when we need it.

When we learn a new word, our brain needs time and repeated exposure to create a strong memory connection. A single encounter with a word, even if we understand its meaning perfectly, is usually not enough for it to become part of our active vocabulary.

Why Do We Forget New Words?

One of the most famous studies about memory was conducted by the German psychologist Hermann Ebbinghaus in the 1880s. His research led to the idea of the Forgetting Curve, which shows how quickly we lose newly learned information when we do not review it.

According to Ebbinghaus’s research, forgetting happens naturally after learning something new. Without reinforcement, a large amount of information can disappear from memory within a relatively short period of time.

This discovery influenced one of the most popular vocabulary learning techniques today: spaced repetition.

Is Spaced Repetition Enough?

Spaced repetition is based on a simple idea: instead of reviewing information once and forgetting it, you review it at gradually increasing intervals.

For example, after learning a new word today, you might review it later the same day, then the next day, three days later, a week later, and then after longer periods of time. Every successful attempt to remember the word strengthens the memory and makes it easier to recall in the future.

There is a lot of evidence showing that spaced repetition is an effective learning technique. However, there is one important question: is it realistic for everyone?

Imagine learning 10 new words today. Tomorrow, you add another 10. The next day, another 10. Very quickly, the number of words you need to review starts increasing. For many adult learners who have jobs, families, and busy schedules, going through hundreds of flashcards every week can become exhausting.

Many learners start with motivation, create vocabulary lists, and follow a strict review system for a short time. However, after a few weeks, the amount of revision becomes overwhelming and they stop.

This does not mean that spaced repetition is ineffective. It simply means that it works best when combined with other strategies that make vocabulary more meaningful and easier to remember.

Create Associations to Make Words Stick

One technique that I personally find very useful is creating associations.

An association is a mental connection between a new word and something you already know. Instead of seeing a word as an isolated piece of information, you give your brain a pathway that can lead you back to it.

Let’s take the word feasible.

Feasible means “possible to do or achieve.” To remember this word, you could connect it with the word fee.

Imagine that there is something you want to do, but first you need to pay a fee. Once the fee is paid, your plan becomes possible. It becomes feasible.

The connection does not need to be perfectly logical. Its purpose is simply to create a memorable link. In this case, the word fee also reminds you of the beginning sound of feasible: fea-. The next time you need a synonym for “possible,” this association may help your brain find the word faster.

You can even create several associations for the same word. The more connections you build, the easier it becomes to access the word when you need it.

Don’t Forget to Use Your Voice

Another step that many learners skip is saying new words out loud.

When you only read a word silently, you train your eyes to recognize it. However, when you pronounce it, you also train your mouth and speech muscles to produce it. This creates another type of memory, sometimes called muscle memory or mouth memory.

This is especially important because knowing a word and using a word are not exactly the same thing.

Have you ever recognized a word while reading but avoided using it in conversation because you were not completely sure how to pronounce it? This hesitation can prevent you from using vocabulary that you actually know.

By saying new words aloud several times, you become more familiar with their pronunciation and more confident when using them in real conversations. The easier a word feels to pronounce, the easier it becomes to use naturally.

Build Connections Between English Words

Another effective strategy is learning vocabulary through chains of synonyms instead of translating every word into your native language.

For example:

possible → feasible

Instead of creating a connection between feasible and a translation in your first language, try connecting it with a word you already know in English.

Over time, your vocabulary becomes a network of connected words rather than a long list of separate translations. This is closer to how fluent speakers store and access vocabulary.

Of course, if you want to remember the exact form of a word like feasible, an additional association can still help. Combining different techniques makes the memory stronger.

Forgetting Words Is Normal — Even for Teachers

Something that might surprise you is that teachers forget words too.

I sometimes forget words that I do not use regularly. For example, words like cinnamon, stroller, goggles, or roller shutters are not part of my everyday vocabulary. If I have not used them for a long time, there is a chance I will need to check them again.

And this is completely normal.

Even native speakers can forget words or expressions when they stop using them regularly. Memory is not a storage room where information stays untouched forever. It is more like a garden: the areas you visit often stay clear, while the areas you ignore gradually become less accessible.

How Many Times Do You Need to See a Word?

Many studies suggest that learners need multiple encounters with a new word before it becomes part of long-term memory. The exact number depends on many factors, but researchers often estimate that learners may need to see or hear a word between 6 and 20 times before it becomes more familiar.

This explains why looking up a word once in a dictionary is rarely enough.

To truly learn a word, you need repeated exposure. You need to meet it in different contexts, hear it, read it, say it, and use it.

Four Simple Habits to Remember More Vocabulary

If you want to remember new English words more effectively, focus on four simple habits.

First, get enough sleep. While you sleep, your brain processes and organizes the information you learned during the day. Good sleep plays an important role in strengthening memories.

Second, create associations. Connect new words with images, sounds, people, objects, or other words you already know. The more personal and unusual the connection, the easier it may be to remember.

Third, say new words out loud. Do not only recognize vocabulary with your eyes. Train your mouth to produce the words so that you feel more confident using them in conversation.

Finally, read and listen regularly. The best review often happens naturally. When you watch videos, listen to podcasts, read articles, or have conversations, you meet words again in different situations. This repeated exposure helps strengthen your memory without endless vocabulary revision.

Final Thoughts

Remembering vocabulary is not about memorizing hundreds of words perfectly. It is about creating enough meaningful encounters with words so that they gradually become familiar and easier to access.

Spaced repetition can be a powerful tool, but for many busy learners, it is not always easy to follow a strict review schedule. Combining different strategies—associations, pronunciation practice, synonym chains, sleep, and regular exposure to English—can make vocabulary learning more effective and sustainable.

Over time, those small encounters add up. Words that once felt unfamiliar start becoming part of your natural English.