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Guide
How to improve your vocabulary as an adult.
Adults learn words much the way children do, mostly from reading. We can just be smarter about it. A few habits do most of the work: meet words in context, look them up in the moment, use them soon, and see them again before you forget.
Read more, and read a little above your level
Most of the words you know came from reading, not from lists. Pick books, essays and long articles that stretch you slightly: a few unknown words on a page is right; ten is a slog that teaches nothing. Vary it. Novels, history, science writing and poems each bring their own words.
Look it up the moment you meet it
Don’t keep a list for later; later rarely comes. Look the word up where you met it, then read the sentence again and see what you missed. The sentence is the best memory hook you will ever get for that word. Gloss’s Paste, and Gloss in the share sheet, exist for exactly this moment.
Learn words in families
Roots do a lot of quiet work. Know that Latin bene means well and you are halfway to benevolent, benefit and benediction. Know lumen, light, and luminous explains itself. Know ubique, everywhere, and ubiquitous stops being a mouthful. Every word page on this site says where the word comes from for this reason.
Use a new word within a day
Say it or write it in a real sentence soon after you meet it: a text, a note, a comment. Producing a word is a stronger memory than recognizing it, and it is what moves a word from “I’ve seen this” to “I can use this.”
See it again before you forget it
Memory fades on a predictable curve, and a word met once is mostly gone within days. Seeing it again just as it starts to fade, after a day, then a few days, then a week, is called spaced repetition, and it is one of the best-supported ways to keep anything you learn. How to remember new words explains why it works.
Learn the difference, not just the meaning
Knowing that wistful and melancholy are both sad isn’t enough. Knowing that wistful is brief and wants something, and melancholy settles in and stays, is what lets you use them. Synonyms with the difference stated are worth more than definitions: melancholy vs wistful is a good place to start.
Collect the words you love
Keep the ones that delight you: petrichor, sonder, apricity. Words you like are words you will use. There is a whole page of beautiful words, and another of untranslatable ones.
A word a day is enough
One word a day is 365 words a year. The habit matters more than the dose, and a small habit you keep beats a big one you drop in February. The word of the day is here every morning; in the app it is chosen for your level.
What the research says, with the numbers
Three studies make the case for everything above. Anne Cunningham and Keith Stanovich counted rare words (outside the 10,000 most common) per thousand words of different kinds of language: adult books 52.7, children’s books 30.9, prime-time television 22.7, and the conversation of college graduates 17.3. Print, including a children’s book, is richer than the most educated talk, and reading volume predicted vocabulary even after controlling for general ability (American Educator, 1998). Marc Brysbaert and colleagues tested 221,268 people and found the median 20-year-old American knows about 42,000 lemmas and the median 60-year-old about 48,200, a rate of roughly one new word every two days through ordinary life (Frontiers in Psychology, 2016). And Paul Nation found that reading comfortably needs about 98% coverage of a text’s words, which for written English is 8,000 to 9,000 word families (Canadian Modern Language Review, 2006). Put together: read above your level but not far above it, look up the words that block you, and let them come back. How many words the average person knows and how to read hard books go deeper.
Questions people ask
What is the fastest way to improve vocabulary as an adult?
Read a little above your level, look words up the moment you meet them, use each within a day, and let them come back on a schedule. Reading is the source; the other three are what make the words stay.
How many words should I learn a day?
One to five that you will meet again. The median adult adds about one every two days naturally, so one a day kept is already double that.
Do vocabulary apps help?
The ones that bring words back on a schedule and make you recall them do. An app that only shows definitions is a reading tool.
Is it too late to build vocabulary at 40 or 60?
No. The median 60-year-old knows about 6,000 more lemmas than the median 20-year-old, because they have read for forty more years.
Sources
Keep reading
How many words does the average person know? · Why you forget a word right after you look it up · The best vocabulary apps for adults in 2026 · All guides