Memory

Should you learn vocabulary as single words or in sentences?

Use both. Word–translation pairs are the quickest way to learn what a word means: in most studies they match or beat learning from sentences on meaning, and in one large replication they did no better. A sentence adds how the word is used and what it goes with, although one example sentence on its own adds little that tests can measure. The card that works is the two together: the translation for the meaning, and a short example from your own reading for context.

By the Readlang Mobile team · Updated 2 November 2026

Are word-translation pairs enough?

For learning what a word means, yes, at least at the start. For being able to use the word, no. That is the short version of three decades of studies that compared word pairs with words in context.

• Pairs give more words. Peter Prince (1996) tested college students in France on English words they had learned either as translation pairs or from English sentences. Translation learning gave more words recalled. But the weaker learners in the study could not transfer what they had learned from translations into English contexts: they knew the meaning and still struggled to use the word in a sentence.
• Short is better than long. Laufer and Shmueli (1997) presented new English words in four ways: as isolated words, in one meaningful sentence, in a text, and in a text with extra clarifying sentences. Half the words in each mode had a gloss in the learners' first language and half a gloss in English. Words in lists and in single sentences were remembered better than words in texts, and first-language glosses were always better retained. A control group that studied the words alone for a quiz scored lowest. The authors suggest that the mental effort that makes words stick may not happen when words are met in a long text, while a bilingual list invites it.
• Deliberately learned words become real words. A common worry is that a word learned from a list stays a fact about the language rather than part of it. Elgort (2011) had learners study 48 invented words (pseudowords) on purpose and then tested them with lexical decision tasks, where people decide as fast as they can whether a string of letters is a word. The learned words produced form, repetition and meaning priming effects, and the pattern of response times pointed to automatic processing. Her conclusion: deliberate learning built both the representation of the words and the fast, automatic access that fluent use needs.

The evidence is not one-sided. Alroe and Reinders (2015) tested the idea again with more than 1,000 first-year university students in Thailand who learned 30 English words as translation pairs, as English sentences with pictures, or as sentences with pictures and a Thai translation. The translation-only group did not do better than the two groups that learned from context. Pairs are an efficient way to get meanings in; they are not a guaranteed advantage, and they never were a complete method.

What does an example sentence add?

A sentence shows what a translation cannot: which preposition follows the word, which nouns it goes with, whether it is formal or casual, and which of the dictionary's senses is meant. Spanish esperar is "to wait", "to hope" or "to expect" depending on the sentence; a pair with one translation teaches one of them.

One sentence, however, teaches less of this than it seems. Webb (2007) compared Japanese learners of English who studied target words as word pairs with learners who studied each word in one sentence with a gloss. He tested each word in 10 ways, covering spelling, meaning and form, grammatical function, and the words it associates with, the kinds of knowledge a sentence should help most. The two groups' scores showed no significant difference. A single context, Webb concluded, may have little effect on what a learner knows about a word.

Knowledge of usage builds up over many meetings. Readers of an unsimplified novel who met new words ten or more times recognised the meaning of 84% of them and knew the word class of 63% (Pellicer-Sánchez & Schmitt, 2010). The example on your card does its job as a reminder and a first meeting; the reading you do afterwards supplies the rest. Our guide to learning words from reading covers how many encounters a word needs.

One thing a sentence should not be early on is your own invention. Barcroft (2004) found that learners of Spanish who wrote each new word into a sentence did worse on tests of producing the words than learners who only studied word–picture pairs. Folse (2006), with 154 university students of English, found that three fill-in-the-blank exercises per word beat one exercise of writing an original sentence. What counts is how many times you retrieve the word, not how long you spend on it once.

What should a vocabulary flashcard look like?

Start with the translation and add the sentence. For most words, a card with the foreign word and its example sentence on the front, and the meaning on the back, gives you both: you recall the meaning, and the sentence shows the word in use. Always try to say the meaning before turning the card; recall is what makes reviewing work (Karpicke & Roediger, 2008).

Two rules keep the cards useful. Keep one word and one meaning per card, so a failed card tells you exactly what you forgot. And keep the sentence short: if it has other words you do not know, the card tests the sentence, not the word. The hub on spaced repetition covers how to schedule the reviews.

Should the sentence come from your own reading?

Where you can, yes, but no study has tested this directly. The research above used sentences written by the researchers. The case for your own sentences rests on indirect evidence and on practicality:

• You already understood it. A sentence from a page you read and followed reminds you of a meeting with the word, not just of a definition. Words that learners needed in order to understand a text were remembered better, and the advantage lasted (Peters, 2007).
• It fixes the right sense. The sentence you met shows which of a word's meanings you need now, which a dictionary entry with ten senses does not.
• It costs nothing extra. You have the sentence in front of you when you look the word up.

The drawbacks are real too. Sentences from novels can be long, old-fashioned or full of other unknown words; cut them down to the part that shows the word. And a word chosen from a book is not necessarily a useful word. For the most frequent words, a dictionary example works as well, and for English our list of the 500 most common words in books shows which those are.

What about sentence mining?

Sentence mining means collecting sentences with new words from what you read, watch or listen to, and turning them into flashcards. Refold, a learning-method guide that recommends it, describes it as finding sentences with unknown words in your own material, looking the words up and saving them as cards, and suggests choosing sentences with one or perhaps two unknown words (Refold).

The studies support parts of it, not the whole. Recalling words on a schedule works; words you needed to understand a text stick better; a single sentence alone adds little measurable knowledge. Mining from your own texts has not been compared with word pairs in a published experiment we could find, so claims that it is faster or more effective are untested. Read it as a reasonable way to choose words and give them context, not as a proven method.

Three adjustments follow from the evidence:

• Put the translation on the card. A mined sentence without the meaning is a guessing exercise. Guessing and then checking led to retention similar to being given the meaning, but took considerably more time (Mondria, 2003).
• Mine words that recur. In our counts, 46% of the different word forms in the median English book occur only once, 54% in French and 58% in Spanish. A card for a word the book never repeats costs reviews for months. The Great Gatsby alone has 3,164 forms that occur once.
• Turn some cards into cloze cards later. Retrieving the word in its sentence several times is the kind of practice that beat writing sentences in Folse's (2006) study.

This page is about the format of the card. Where the words should come from, word lists or books, is covered in learning words from reading, and our first-week plan puts cards and reading into one daily routine.

Does your level change the answer?

It changes the balance. In Prince's (1996) study, translation pairs gave more words recalled, and it was the weaker learners who had trouble using translation-learned words in English contexts. A practical reading of that result:

• Beginners: learn the most frequent words mostly as word pairs, with a short example on the card, and meet them in easy texts. Long sentences full of unknown words do not give a beginner context; they give more unknown words.
• Intermediate and advanced learners: most new words come from reading, so the word-with-sentence card becomes the default, and cloze and reverse cards are worth adding for words you want to use.

At every level, the card is only the start: the meaning goes in through the translation, and the usage grows with each later meeting in books, films and conversation.

References

1. Alroe, M. J., & Reinders, H. (2015). The role of translation in vocabulary acquisition: A replication study. Eurasian Journal of Applied Linguistics, 1(1), 39–58. doi:10.32601/ejal.460588
2. Barcroft, J. (2004). Effects of sentence writing in second language lexical acquisition. Second Language Research, 20(4), 303–334. doi:10.1191/0267658304sr233oa
3. Elgort, I. (2011). Deliberate learning and vocabulary acquisition in a second language. Language Learning, 61(2), 367–413. doi:10.1111/j.1467-9922.2010.00613.x
4. Folse, K. S. (2006). The effect of type of written exercise on L2 vocabulary retention. TESOL Quarterly, 40(2), 273–293. doi:10.2307/40264523
5. Karpicke, J. D., & Roediger, H. L. (2008). The critical importance of retrieval for learning. Science, 319(5865), 966–968. doi:10.1126/science.1152408
6. Laufer, B., & Shmueli, K. (1997). Memorizing new words: Does teaching have anything to do with it? RELC Journal, 28(1), 89–108. doi:10.1177/003368829702800106
7. Mondria, J.-A. (2003). The effects of inferring, verifying, and memorizing on the retention of L2 word meanings: An experimental comparison of the “meaning-inferred method” and the “meaning-given method”. Studies in Second Language Acquisition, 25(4), 473–499. doi:10.1017/S0272263103000202
8. Pellicer-Sánchez, A., & Schmitt, N. (2010). Incidental vocabulary acquisition from an authentic novel: Do Things Fall Apart? Reading in a Foreign Language, 22(1), 31–55. Full text (ERIC)
9. Peters, E. (2007). Manipulating L2 learners' online dictionary use and its effect on L2 word retention. Language Learning & Technology, 11(2), 36–58. hdl:10125/44103
10. Prince, P. (1996). Second language vocabulary learning: The role of context versus translations as a function of proficiency. The Modern Language Journal, 80(4), 478–493. doi:10.1111/j.1540-4781.1996.tb05468.x
11. Refold. Sentence mining. refold.la, checked 1 November 2026.
12. Webb, S. (2007). Learning word pairs and glossed sentences: The effects of a single context on vocabulary knowledge. Language Teaching Research, 11(1), 63–81. doi:10.1177/1362168806072463