I once spent an entire flight learning fifty new English-adjacent words for a trip, felt genuinely proud of myself, and then forgot almost all of them by the following weekend. Not slowly, either — more like they evaporated overnight. If that’s happened to you, I promise it’s not that you have a bad memory. It’s that most of the ways we’re taught to learn words are quietly working against how memory actually functions.

Why plain repetition doesn’t stick

Reading a word ten times in a row feels productive, but it barely counts as learning in any meaningful sense. Memory research draws a pretty consistent line between shallow processing — just seeing or hearing something repeatedly — and elaborative processing, where you actually connect the new thing to something you already know. Rote repetition sits firmly in the shallow category, and studies on vocabulary learning back up what that flight taught me the hard way: rote learning consistently produces weaker retention than techniques that force deeper engagement with a word’s meaning.

The keyword method — weirder than it sounds, and it works

Here’s one of the more surprisingly well-tested techniques out there: the keyword method. The idea is to take a new word and connect it to a word you already know that sounds similar, then build a small, vivid, slightly ridiculous mental image linking the two.

A classic example: the English word “beauty” sounds a bit like the Mandarin word for snot. So a learner might picture a beautiful person suddenly blowing their nose loudly — an absurd image, sure, but a memorable one. In one well-known study on English speakers learning Russian vocabulary, learners using this method scored 72% correct on a later test, compared to 46% for a control group given no particular strategy. That’s not a marginal difference. Another study found people still remembering keyword-linked words a full decade later, with just a brief refresher.

Why does something this goofy work? Two overlapping reasons. First, dual coding theory — the idea that pairing verbal information with a mental image gives your brain two separate paths back to the memory instead of one, so if you lose the word itself, the image can still pull it back. Second, the generation effect I’ve mentioned before: you’re building this connection yourself, not being handed it, and self-generated information tends to stick better than anything passively received.

Your body remembers things your brain forgets

There’s a newer, genuinely interesting line of research on gestures and vocabulary retention. Pairing a new word with a physical gesture — actually moving your hands or body while learning it — has been shown to improve long-term recall compared to learning the same word without any physical component. The idea is that language and physical action are more entangled in the brain than we tend to assume, and putting a word into your body, not just your ears, gives it another anchor point.

You don’t need a formal system for this. If you learn the phrase “brush it off,” actually mime brushing something off your shoulder while you say it. It feels silly. Do it anyway.

The honest flaw in all of this

None of these techniques are free. The keyword method takes real effort to construct — you have to sit with a word for a minute, hunt for a sound-alike, build an image that actually connects to the meaning. That’s slower than flipping through fifty flashcards in ten minutes, and if you’re trying to cram in bulk before some deadline, this approach won’t feel efficient. It’s built for retention, not speed. And it works best on words with a fairly concrete, imageable meaning — “beauty” and “brush off” lend themselves to a picture. Abstract words like “nevertheless” or “consequently” are harder to hang an image on, and honestly, for grammar-glue words like that, plain repetition in context works better than forcing a strained keyword connection.

Putting it together

1. Pick one or two new words a day — not fifty. Quality of encoding beats quantity every time.
2. For concrete, imageable words, build a genuinely weird keyword image. The weirder, the more memorable.
3. For abstract or function words, skip the mnemonic and instead write your own sentence using the word about something real in your life.
4. Add a small physical gesture if the word has any action or emotion attached to it.
5. Review it a day later, then a few days after that — this is where spacing and encoding work together, not against each other.

Pick one word right now, before you close this. Build the strangest possible image for it. You’ll remember it next week, and that’s the entire point.