Mysteries of the brain

Why do we suddenly forget certain words? The "tip of the tongue" effect

You’re talking with friends, everything is flowing perfectly… but then it happens. The name of that actor from a classic movie, or even something as simple as a familiar word, suddenly disappears. You can almost feel it there, but you just can’t say it. And it’s not just you. This happens to everyone, and there’s even a name for it. It’s called the "tip-of-the-tongue" phenomenon, and here you'll discover why your brain does this and what you can do when it happens.

It’s probably happened to you, too: you’re seconds away from remembering a word, you can almost grab it, but it slips away. That frustrating mental pause is called the "tip-of-the-tongue" (TOT) phenomenon, also known as lethologica.

According to cognitive neuroscience research published by the National Library of Medicine, it’s a temporary moment when a perfectly familiar word, one you absolutely know and understand, refuses to fully come forward in your mind and your mouth. In simple terms, your brain has the meaning, but can’t quite pull up the sound of the word.

If this happens to you often, don’t worry. The "tip-of-the-tongue" (TOT) effect is not a sign of a failing memory. Simply put, it’s not a malfunction; it’s more like a system getting momentarily crowded.

According to one of the theories that explains this phenomenon, you don’t forget words because you don’t know them, but because your brain knows too many words. When you try to pull out one specific term, other words can briefly "block it" from coming. The more you know, the more your brain has to sift through, and sometimes the right word gets momentarily stuck.

Sometimes you briefly forget a word simply because you haven’t used it in a while. If a term isn’t part of your regular conversation, the "path" to saying it isn’t as well-worn.

A widely accepted scientific explanation, known as the "Transmission Deficit Hypothesis", adds to this idea. It suggests that the brain can easily retrieve the meaning of a word, but has more difficulty pulling up its sound at the same time. Basically, you don’t lose the word itself; you just momentarily lose access to how to say it.

Among the words most often "affected" by the TOT, names of people and places tend to be the first to slip away. And that’s not a coincidence.

Unlike everyday words like "car" or "house," proper names have fewer mental connections. Each name is unique in sound and meaning, with almost no similar words to "pull" it into memory. In essence, common words are tied to a web of associations we use every day, while names are more isolated in the brain, making them harder to grab when you suddenly need them after a while.

It’s ironic, but the more you try to remember that word or name, the harder it becomes. And it’s not just a feeling; it’s something well documented.

The moment you realize you can’t recall it, a bit of frustration and anxiety naturally kicks in. According to psychology and cognitive neuroscience, stress can actually interfere with memory, as it further blocks the neural pathways to vocabulary. Often, the best way to get it back is simply relaxing and letting it go for a moment.

It seems that when you finally give up and decide to stop chasing the word because it just won’t come, out of nowhere, it suddenly pops into your head.

Since stress and frustration can block memory retrieval, the key is often to stop forcing it. The so-called "let it go" strategy is exactly that: shift your attention to something else, talk about a different topic, or simply move on as if it doesn’t matter. And then, when you least expect it, the word returns on its own.

The strategy of shifting your attention for a moment works surprisingly well, but it’s not the only trick that can help. There’s another simple method people often use when a word just won’t appear.

It’s called the "alphabet trick," a basic memory exercise where you slowly go through the letters of the alphabet, sometimes in your head, sometimes out loud, one by one. The idea is that the single sound of a letter can "trigger" the missing word. For example, if you’re trying to remember the name of Diane Keaton, by the time you reach "D," there’s a good chance it suddenly pops back in your mind.

And it’s not just the sound of the letters that can help you recover a forgotten word or name. You can also get there through its meaning.

When TOT happens, it’s often recommended to start circling the idea instead of chasing the exact word. Think of related terms, synonyms, or simply describe what you’re trying to name: what it does, what it looks like, where you heard it, or who you associate it with. All of those mental clues can guide your brain to the word you were looking for, often when you don’t try so hard to force it.

Another way to train your brain when it comes to vocabulary is simple, but powerful: challenge it regularly. How? Word games like crossword puzzles, Scattergories, or quick spelling challenges are not just fun, they’re real mental exercises. In fact, they can stimulate your recall even more than passive reading.

It may sound like a cliché, but it’s true. Every time you force your brain to search for meanings, patterns, or exact word forms, you’re essentially practicing for those TOT moments, so the next time a word disappears, your mind finds it faster.

Word games are great, there’s no doubt about it. However, when we talk about "exercise," we’re not just referring to mental workouts.

Science has shown a clear connection between aerobic activity, sleep quality, and how well the brain processes language. Staying physically active, moving throughout the day, and getting a solid night’s sleep all work together to support brain health, especially memory. So yes, if you take care of both mind and body, those frustrating "what is that word?" moments can become less frequent.

The truth about your brain

You won’t believe what happens in your brain while you sleep

Image: Milad Fakurian

Your brain is one of the most powerful and mysterious organs in your body. It controls everything from your thoughts to your emotions and even processes information at lightning speed. But how much do you really know about it? Some long-believed myths about the brain have been debunked, while other surprising facts reveal just how incredible this organ truly is. Get ready to be amazed by these fascinating brain facts!

Image: Natasha Connell

You’ve probably heard this one before, but it’s completely false! While it’s true that not all parts of the brain fire at the same time, imaging studies show that most regions are active throughout the day, even when we sleep.

Your brain is constantly working, controlling bodily functions and emotions, and processing information. So next time someone says you’re only using 10% of your brain, you can confidently tell them that’s just a myth!

Image: Aarón Blanco Tejedor

Here’s a weird fact: While your brain processes pain signals from the rest of your body, it has no pain receptors of its own. This is why surgeons can perform brain surgery on conscious patients without causing them pain.

However, the membranes and tissues surrounding the brain do have pain receptors, which is why headaches and brain injuries can be so excruciating.

Image: Usman Yousaf

How come we have headaches if the brain has no pain receptors? Well, that’s because headaches are triggered by chemical activity in the brain, changes in nerves and blood vessels, and even fluctuating serotonin levels.

In some cases, hormones like estrogen can also play a role, which explains why migraines are more common in women.

Image: Go to Johannes Plenio's profile Johannes Plenio

Dreams are proof that your brain never rests! (Warning: this fact can make you feel exhausted.) While you sleep, your limbic system, that is, the part of the brain that deals with emotions, becomes especially active, which is why dreams often feel so intense.

On average, humans experience four to seven dreams per night, even if we don’t always remember them. And what about that scary nightmare about falling? Well, you can thank your amygdala, the brain’s fear center, for that one.

Image: Brett Jordan

Have you ever walked into a room and instantly forgotten what you were after? That’s because short-term memory only lasts about 20-30 seconds! That’s not enough!

Your brain holds a limited amount of information in its active state before deciding whether to store it or discard it. Ironically, we can’t really choose what makes the cut, but we do hope these facts stay with you!

Image: BUDDHI Kumar SHRESTHA

That sharp, icy pain when you eat something too cold? It’s your brain’s way of telling you to slow down! Officially called sphenopalatine ganglioneuralgia, a brain freeze happens when cold food or drinks rapidly chill the blood vessels in your throat, causing them to constrict and then rapidly expand. This sends pain signals to your brain, warning you of the sudden temperature shift. It’s annoying, but it’s actually your body trying to protect itself!

Image: Josh Riemer

You didn’t need us to tell you, but let’s look at the details: The average person has between 12,000 and 60,000 thoughts per day. What’s even more interesting? 95% of those thoughts are the same ones you had yesterday. Is that not surprising enough? Hear this out: 80% of them tend to be negative. That’s because our brains are wired for survival, constantly analyzing risks and potential dangers.

Image: Terry Vlisidis

Even though it only makes up about 2% of your body weight, your brain employs a major quantity of energy! It consumes 20% of your oxygen and blood supply, making it one of the most demanding organs in your body.

If your brain goes without oxygen for just five minutes, brain cells start dying, leading to irreversible damage. This is why deep breathing and cardiovascular exercise are great for brain health!

Image: Alexander Andrews

Do you know that feeling when you hit the back of your head and see stars? That’s because your occipital lobe, which controls vision, is located at the back of your brain. If you get hit there, your brain momentarily misfires, causing flashes of light.

Interestingly, your brain processes vision on the opposite side; while your right brain controls your left eye, your left brain controls your right eye. It’s one of the many ways the brain operates in a complex way.

Image: Rodion Kutsaiev

Believe it or not, your brain generates between 12 and 25 watts of electricity when you’re awake. If you can’t really grasp how powerful that is, check this out: It’s enough to power a small light bulb! Your brain’s electrical activity is what allows neurons to send signals at speeds of up to 260 miles per hour.

Image: Robina Weermeijer

Your brain may be the fattiest organ in your body, consisting of at least 60% fat! This is why consuming healthy fats, like omega-3s and omega-6s present in fish, for example, is essential for brain health.

Healthy fats stabilize brain cell walls, reduce inflammation, and support cognitive function. So go ahead and enjoy that avocado toast, it’s food for your brain!

Image: Robina Weermeijer

It’s not just your memory that fades over time; the brain itself physically shrinks as one gets older. It continues developing until your late 40s, but after that, it slowly decreases in size.

Now, size doesn’t equal intelligence, so a smaller brain doesn’t necessarily mean a less capable one. Staying mentally active, exercising, and eating brain-boosting foods can help keep it in top shape!

Image: Lisa Yount

We often think of cholesterol as bad, but your brain actually depends on it! In fact, 25% of your body’s cholesterol is stored in your brain, where it helps with learning and memory. However, unlike other organs, the brain can’t absorb cholesterol from the blood, it has to produce its own. So, while too much cholesterol in the body can be harmful, the right amount is vital for brain function. At least you can use that as an excuse to get that burger!