How to learn vocabulary that actually sticks

Most vocabulary advice is about memorising. Kungfucius's experience is that memorising is the smaller half of the problem. The larger half is meeting each word often enough, in enough real situations, that it stops being a flashcard and becomes something you simply know.

That takes several channels working together: reading, listening, video, one narrow topic you care about, and a review system that keeps the catch from leaking away.

How many words do you need to be fluent

Fewer than the dictionary suggests, more than the apps promise. The most frequent two to three thousand words of a language do most of the work in everyday conversation. For comfortable reading the bar is far higher: the vocabulary researcher Paul Nation estimated for English that following ordinary written text without help takes around 8,000 to 9,000 word families, and spoken language around 6,000 to 7,000.

Two cautions for Asian languages. Counts depend on what you call a word, and in Chinese a few thousand characters combine into tens of thousands of words, so character counts and word counts are different numbers.

The second caution matters more. Knowing a word is not a yes-or-no question. You may recognise 打 (dǎ) as "hit" and still be lost when it turns up in 打電話 (打电话, dǎ diànhuà, to make a phone call), 打車 (打车, dǎ chē, to take a taxi) and 打折 (dǎ zhé, to give a discount). Depth beats raw counts.

Should you learn vocabulary from frequency lists

Use a frequency list as a checklist, not as a textbook. It tells you which words deserve attention first, and it is a useful way to spot gaps: if a word in the top thousand still looks unfamiliar, fix that today.

Learning the list itself from top to bottom works badly. The most frequent words are also the ones with the most meanings, and a bare list gives you none of them. It is also very dull, which is a practical problem and not only an aesthetic one.

Learn words in phrases and situations, not in isolation

Kungfucius's firm view is that vocabulary is best learned in phrases and full situations instead of isolated words. An isolated word gives you a translation. A phrase gives you the partner words, the grammar around them and a scene to hang them on.

The partner words are where translations fail. Take three everyday actions:

English	Chinese	Japanese	Korean
to take medicine	吃藥 (吃药) chī yào, "eat medicine"	薬を飲む kusuri o nomu, "drink medicine"	약을 먹다 yageul meokda, "eat medicine"
to make a phone call	打電話 (打电话) dǎ diànhuà, "hit telephone"	電話をかける denwa o kakeru, "hang a telephone"	전화를 걸다 jeonhwareul geolda, "hang a telephone"
to take a photo	拍照 pāizhào, "pat a photo"	写真を撮る shashin o toru	사진을 찍다 sajineul jjikda, "stamp a photo"

Nobody who memorised "medicine = 薬" alone will guess that the Japanese drink it. Learn the verb and the noun as one unit and the question never comes up.

A full situation goes one step further. "At the pharmacy with a cold" holds the words for symptoms, the question the pharmacist asks, the polite request and the counter for tablets, and they all remind you of each other. Words learned in a scene come back as a group. Words learned from a list come back one at a time, if they are in the mood.

Reading builds vocabulary, listening and YouTube deepen it

Reading is the classic vocabulary builder and deserves its reputation. Text is dense, it uses rarer words than speech, and you can stop on a word for as long as you like. The page on reading covers how to choose material.

Reading alone leaves a gap, though, and learners of Chinese and Japanese fall into it most often: you know what a word means on the page and fail to recognise it when somebody says it. So Kungfucius's advice is to listen as well, and to watch YouTube videos, both to deepen the words you have and to explore new ones.

Video adds what a page cannot:

• Sound. Tones, pitch and the way words shrink at natural speed.
• Situation. You see who says the word, to whom, in what mood and how politely.
• Repetition without boredom. A channel about one subject reuses its core vocabulary in every episode.
• New words you would not have looked for. Slang, fillers and the current way of saying things reach video long before they reach textbooks.

Turn on subtitles in the target language where they exist. The eye catches the word, the ear confirms it, and you have met it twice in one second.

Combine immersion, YouTube, niche fluency and spaced repetition

No single method creates enough context. In Kungfucius's experience the context that makes words stick is best built by combining several ways.

Immersion. Fill ordinary hours with the language: phone settings, podcasts while cooking, the evening series. This supplies volume and the situations themselves. The forms it can take are described under immersion.

YouTube. The cheapest supply of real speech on any topic, at any level, with a pause button.

Niche fluency. Become fluent in one narrow topic you care about first. Pick something small, such as ramen, badminton, Korean skincare or Taiwanese politics, and read, watch and listen to everything about it. A narrow topic recycles the same few hundred words until they are automatic, and it gives you something you can really talk about. Then widen to the neighbouring topic. Linguists call the input side of this narrow reading and narrow listening, an idea associated with Stephen Krashen.

Spaced repetition. An SRS such as Anki shows you a card just before you would forget it, so the words you met this week are still there next month. The details are on the page about spaced repetition. Put whole sentences from your own reading and viewing on the cards, a habit known as sentence mining, and the cards carry the context with them.

The division of labour is simple. Immersion, YouTube and your niche let you meet the words. The SRS stops you losing them. A deck with no input behind it is a list with better software.

Common mistakes with vocabulary

• Collecting instead of learning. Fifty new cards a day feels productive until the reviews arrive.
• One translation per word. It is a starting point. Add the phrase you found the word in.
• Reading only. Every word needs to be heard as well, or it stays a silent acquaintance.
• Waiting for a complete vocabulary before using it. Words become permanent when you need them in a real sentence.

What to do this week

1. Choose your niche: one topic narrow enough to describe in three words.
2. Find three YouTube channels and one written source about it in the target language.
3. Watch or read for twenty minutes a day and note at most five phrases, never single words.
4. Put those phrases into your SRS and review daily.
5. At the end of the week, explain the topic aloud for two minutes. The words you reach for and cannot find are next week's list.