What Are Context Clues?

Context clues are the hints around an unfamiliar word that let you work out what it means without a dictionary. In The old bridge was precarious, swaying and creaking with every step, the details swaying and creaking tell you that precarious means unstable or dangerous. Using context clues is a core reading skill for native and second-language readers alike, and it is the main way people pick up new words from reading.

The five main types of context clues

Clues also come from inside the word. Knowing the morphemes in unpredictable (un- + pre- + dict + -able) gets you most of the way without any context at all. Grammar helps too: if the word follows a or the, it is probably a noun.

A step-by-step method

1. Identify the part of speech. Is the unknown word a noun, verb, adjective or adverb?
2. Look at the immediate sentence. What does the word do to or describe? Are there signal words?
3. Widen the view. Read the sentences before and after for definitions, examples or contrasts.
4. Look inside the word for familiar roots, prefixes and suffixes.
5. Make a guess and test it. Replace the word with your guess. Does the sentence still make sense?
6. Check if it matters. If the word is important or keeps appearing, confirm the meaning in a dictionary.

The limits of context

Context clues are useful but not magic. Beck, McKeown and McCaslin (1983) classified natural contexts as directive (clearly pointing to the meaning), general, nondirective and even misdirective (leading readers to the wrong meaning). In real texts, many contexts are weak. Consider She gave him a wry smile: the sentence tells you wry describes a smile, but not what kind.

Studies of native-speaking children by Nagy, Herman and Anderson (1985) estimated that the chance of learning a word's meaning from a single encounter in context is small, roughly in the range of 5 to 15 percent. Learning from context works through accumulation: many encounters, each adding a little.

Guessing also depends on lexical coverage. When you know about 98 percent of the surrounding words, each unknown word sits in a clear context. At 90 percent, the context is full of gaps too, and guesses become unreliable.

Why context clues matter for vocabulary learners

Most native speakers learn the bulk of their vocabulary from context, not from instruction. For second-language learners, incidental learning from reading and listening is the only realistic way to reach the 8,000–9,000 word families needed for comfortable reading. Context also teaches what dictionaries cannot: how a word is used, its typical partners and its tone. And because many words are polysemous, context is what tells you which sense applies.

How to combine context and lookups

• Guess first, then check. Trying to infer a meaning, even incorrectly, makes you process the word more deeply than looking it up immediately.
• Keep lookups fast so they don't break your reading flow. In a browser, Wordie shows a definition when you select a word, so you can confirm a guess in a second and keep reading.
• Save words that recur. A word worth guessing twice is worth learning properly.
• Read at the right level. Extensive reading of comfortable texts gives you the strongest contexts.

Our guide on how to use context clues has practice exercises and more examples.

Common mistakes

• Trusting a guess too much. A confident wrong guess can stick for years. Verify important words.
• Ignoring signal words like but, unlike and such as, which often give the meaning away.
• Guessing in texts that are too hard. If every line has several unknown words, choose easier material.

Sources: Beck, I., McKeown, M. & McCaslin, E. (1983), Vocabulary development: All contexts are not created equal, Elementary School Journal; Nagy, W., Herman, P. & Anderson, R. (1985), Learning words from context, Reading Research Quarterly; Nation, P. (2006), Canadian Modern Language Review.