How to Improve
Your Vocabulary

Read Widely and Above Your Comfort Level

Reading is the single most powerful method for vocabulary growth, backed by decades of research. Stephen Krashen's extensive body of work on "free voluntary reading" consistently shows that people who read widely and regularly acquire vocabulary at rates no deliberate study method can match over the long term. The reason is simple: reading exposes you to words in rich, varied, meaningful contexts — far more efficiently than any word list.

The key word in "read widely" is widely. Reading only within your comfort zone — familiar topics, familiar authors — limits vocabulary exposure to words you already know. To grow your vocabulary, you need to read slightly above your comfort level: texts where you recognise 90–95% of words but encounter 1–2 new words per page. This is the input zone where learning happens.

What to read for maximum vocabulary growth

• Literary fiction — consistently the richest source of low-frequency vocabulary. Novels by writers like Marilynne Robinson, Kazuo Ishiguro, or Hilary Mantel use vocabulary that rarely appears in journalism or non-fiction.
• Long-form journalism — The New Yorker, The Atlantic, The Economist. These publications use sophisticated vocabulary in contexts where meaning is usually inferable from the surrounding prose.
• Non-fiction outside your domain — reading about unfamiliar subjects forces you into unfamiliar vocabulary territory. A software engineer reading history, or a lawyer reading popular science, encounters vocabulary their professional reading never provides.
• Classic literature — older texts (Victorian fiction, early 20th-century prose) use vocabulary that has since dropped out of everyday use but still appears in educated writing. Readers of Dickens, Eliot, or James encounter thousands of words not found in contemporary journalism.

Use Spaced Repetition (SRS)

Spaced repetition exploits one of the most robust findings in memory research: the spacing effect, first described by Hermann Ebbinghaus in 1885. Memory for a piece of information is strengthened more by reviewing it at increasing intervals than by reviewing it repeatedly in a single session. A word reviewed today, then in 2 days, then in 5 days, then in 12 days is far better retained than a word reviewed 10 times in one sitting.

Spaced repetition software (SRS) automates this scheduling. The most widely used tool is Anki — free, cross-platform, and highly customisable. Anki shows you cards at precisely the interval that keeps each word at the edge of forgetting, which is where memory consolidation is strongest. Studies consistently find that SRS produces two to five times better retention than massed practice for the same total study time.

How to use SRS effectively for vocabulary

• Write your own cards. The act of creating a card forces you to process the word more deeply than using pre-made decks. Include the word in a sentence you encountered it in — not just the definition.
• Use cloze deletion. Instead of "word → definition," use "The plan was _____ [adjective meaning risky and daring]." Cloze forces recall rather than recognition.
• Limit daily new cards to 10–15. More than this creates an unsustainable review burden within weeks. Consistency over months is more valuable than intensity over days.
• Review every day without exception. Missing a day causes cards to pile up; missing a week means hundreds of overdue reviews. Daily 15-minute review is more effective than occasional long sessions.

Learn Word Families, Not Single Words

When you learn a new word, you are standing at the entrance to an entire family. The base word analyze unlocks analysis, analyst, analytical, analytically, over-analyze, reanalyze — six additional words for almost no extra effort. Learning word families rather than individual forms is one of the highest-leverage habits in vocabulary study.

Nation (2001) estimates that learning a word family effectively triples the vocabulary value of each item you study. Instead of learning three separate words with three separate study sessions, you learn one base form and derive the others through understanding of English morphology — the system of prefixes, suffixes, and roots that govern how words are formed.

Key suffixes to know

Suffix	Meaning	Examples
-tion / -sion	noun (act or result)	analyze → analysis, conclude → conclusion
-ity	noun (quality)	ambiguous → ambiguity, complex → complexity
-al / -ical	adjective	analysis → analytical, method → methodical
-ly	adverb	significant → significantly, precise → precisely
-ise / -ize	verb	emphasis → emphasise, symbol → symbolize
-er / -or	person noun	analyze → analyst/analyzer, research → researcher

Always Learn Words in Context

The most common vocabulary study mistake is learning words in isolation: a word on one side of a card, a definition on the other. This produces fragile knowledge — you may recognise the word on a test but fail to use it correctly in writing or understand it when it appears in a different grammatical form or context.

Context does several things that definitions cannot. It shows the word in its natural grammatical environment — which prepositions it takes, what nouns it collocates with, whether it carries a positive or negative connotation. It activates associations between the new word and concepts already in your memory, making retrieval faster and more reliable. And it is far more memorable: a word encountered in a sentence that surprised, amused, or moved you is retained far better than the same word on a flashcard.

When you encounter an unfamiliar word, record the entire sentence you found it in, not just the definition. When creating flashcards, write the word into a new sentence of your own — this forces you to actively process its meaning and use. Webb (2007) found that a minimum of 10–15 exposures in varied contexts are needed before a word moves reliably into long-term memory; no single encounter is enough.

Target High-Value Word Lists

Not all vocabulary is equally useful. Frequency-ranked word lists let you prioritise words that appear often in real English, so that every word you learn delivers maximum coverage improvement.

• General Service List (GSL) — the 2,000 most frequent word families in English. If you are a learner below B2, these are your highest priority. Knowing the GSL gives you coverage of approximately 80% of everyday spoken English.
• Academic Word List (AWL) — 570 word families that appear frequently across academic disciplines. Essential for learners aiming at B2 or above, and for anyone reading academic or professional English. The AWL adds approximately 10% academic text coverage on top of the GSL.
• New General Service List (NGSL) — an updated 2,800-word list built from a larger, more contemporary corpus than the original GSL. A better starting point than the GSL for learners beginning in 2020 or later.
• GRE High-Frequency Word Lists — for native speakers preparing for the GRE or SAT, or for advanced learners aiming at C1–C2. These lists cover the 500–1,000 words most likely to appear in standardised verbal reasoning tests. See our SAT & GRE vocabulary guide for detail.

Learn Latin and Greek Roots

Approximately 60% of English vocabulary — and over 90% of academic and scientific vocabulary — derives from Latin and Greek roots. Learning a relatively small number of roots unlocks the meaning of a very large number of words simultaneously.

Consider the Latin root port (to carry): it explains transport, import, export, portable, portfolio, deportation, report, support. Or the Greek root graph (to write): biography, autograph, photograph, paragraph, typography, calligraphy, geography, stenography. Each root you learn provides a key to an entire family of words across multiple domains.

High-value roots to prioritise

Root	Origin	Meaning	Key words
-ven- / -vent-	Latin	come	convention, intervention, prevent, revenue
-spec- / -spect-	Latin	look, see	inspect, prospect, retrospect, spectacle
-log- / -logy	Greek	word, reason	biology, psychology, analogy, prologue
-chron-	Greek	time	chronology, synchronise, anachronism
-fer-	Latin	carry, bear	transfer, infer, prefer, defer, conference
-mort-	Latin	death	mortal, immortal, mortality, mortgage
-path-	Greek	feeling, disease	empathy, sympathy, pathology, apathy

Investing 2–3 hours learning 50 high-frequency roots can unlock recognition of hundreds of unfamiliar words — one of the highest returns on vocabulary study time available.

Study Collocations, Not Just Definitions

Native speakers do not assemble sentences word by word from definitions — they retrieve words in chunks, as habitual combinations. Heavy rain (not strong rain). Make a decision (not do a decision). Commit a crime (not make a crime). These fixed combinations — collocations — are what makes speech and writing sound natural rather than grammatically correct but stilted.

Learners who know definitions but not collocations produce language that is technically accurate but sounds foreign. Moving from B2 to C1 depends heavily on developing collocation awareness — knowing not just what a word means but what it combines with and in what contexts.

The best resources for collocations are: the Oxford Collocations Dictionary, the Cambridge Learner's Dictionary (which marks key collocations), and the Sketch Engine corpus tool (which generates frequency-ranked collocates from real text). When you learn a new word, immediately look up its three or four most common collocates and add them to your flashcard.

Practice Output: Write and Speak

Reading and flashcards build receptive vocabulary — words you recognise when you encounter them. But receptive knowledge does not automatically become productive knowledge — words you can actively retrieve and use correctly in your own speech and writing. The gap between receptive and productive vocabulary is typically 30–50%, and closing it requires deliberate output practice.

The most effective output practice is writing. When you write, you must actively retrieve words, choose between near-synonyms, and deploy them in grammatically and collocationally correct structures. This effort — the struggle to find the right word — is exactly what strengthens the neural pathways for productive retrieval.

• Write a short summary of every article or chapter you read, using at least two or three new words from it.
• Write journal entries using vocabulary you are currently studying. The personal context makes the words more memorable.
• Find a language exchange partner and commit to using target vocabulary in conversation. Speaking under time pressure is the hardest — and most effective — output practice.
• Shadow podcasts or speeches — listen and repeat aloud simultaneously. This builds productive phonological representations alongside meaning.

Listen to Demanding English

Listening is underrated as a vocabulary-building medium. Spoken English exposes you to vocabulary that written English does not: informal register, phrasal verbs in natural rhythm, idioms used spontaneously rather than explained pedagogically, and the prosodic cues (stress, intonation) that convey meaning beyond literal content.

The key is to listen to demanding content — material where the vocabulary and ideas are at the edge of your comprehension, not comfortably within it. Easy listening (pop music, casual YouTube) uses vocabulary you already know. Challenging listening (academic lectures, long-form interviews, documentary narration) introduces vocabulary in phonological context.

• Podcasts with transcripts (BBC In Our Time, Lex Fridman, NPR Fresh Air) — listen first, then read the transcript to catch words you missed.
• Audiobooks of literary fiction read by excellent narrators — literary vocabulary delivered with prosodic richness.
• TED Talks and academic lectures — intellectual vocabulary in structured argument.
• Documentary narration (David Attenborough, Ken Burns) — measured pace with high-quality vocabulary.

Keep a Vocabulary Notebook

A physical or digital vocabulary notebook serves a different function from flashcards. Rather than optimising for retrieval practice, a notebook is a record of encounter — a personalised log of words that caught your attention in real reading and listening. This makes the notebook itself a rich, contextual document rather than a bare list.

For each entry, record: the word, the sentence you found it in, the source (book title and page, URL, podcast name), the definition, and one or two key collocates. Reviewing your notebook periodically — once a week, once a month — gives you a different kind of retrieval practice than flashcards: you re-encounter the word in its original context, which reactivates the associations formed when you first found it.

Many avid readers keep vocabulary notebooks for years and find them valuable not just as study tools but as personal reading journals — a record of their intellectual encounters with language over time.

Review Your Missed Words After Tests

The words you miss on a vocabulary test are, by definition, the words just above your current knowledge boundary — which makes them the highest-priority words to study. Learning these words moves you directly upward; learning words you already know wastes study time.

After taking our vocabulary test, you receive a list of every word you answered incorrectly. This missed-word list is a personalised study list calibrated to your exact vocabulary ceiling. Adding these words to your SRS deck and prioritising them in your reading is the most efficient possible use of vocabulary study time — targeted rather than random, calibrated rather than generic.

This principle generalises beyond our test: any time you encounter an unknown word — in reading, in listening, on any test — that word represents a specific gap in your vocabulary that a targeted response can close. The discipline of capturing unknown words rather than skipping past them is one of the habits that most differentiates high-growth from low-growth vocabulary learners.

Prioritise Consistency Over Intensity

Vocabulary growth is a compound process — it accumulates slowly but relentlessly when consistently pursued. The Brysbaert et al. (2016) study found evidence consistent with native English speakers acquiring approximately one new word per day throughout adulthood. That modest daily rate produces a vocabulary gap of 10,000–15,000 words between a 60-year-old avid reader and a 60-year-old who rarely reads.

The implication is that the best vocabulary-building schedule is one you can sustain indefinitely — not a two-week intensive sprint followed by months of inactivity. Fifteen minutes of daily reading in demanding material, combined with ten minutes of SRS review, will outperform any intensive study programme that burns out after a month.

Research on habit formation suggests that consistency is best supported by attaching new habits to existing ones. Pairing vocabulary review with morning coffee, or replacing ten minutes of social media scrolling with ten minutes of SRS, requires no additional time — only redirection of existing routines. The compound effect over months and years is transformative.