Why context clues matter
Every book you read will include words you do not know. Strong readers do not stop at each one or skip it. They use context clues, which are hints in the surrounding words and sentences, to figure out what the word means.
Researchers estimate that students learn thousands of new words each year, and most of them are learned from reading, not from vocabulary lists. Context clues are how that happens.
The five main types of context clues
1. Definition clues
The author tells you the meaning directly. This is called a definition clue.
The archaeologist, a scientist who studies objects from the past, carefully brushed the dirt off the pottery.
Look for commas, dashes, parentheses and phrases like is, means, refers to, is called and in other words.
2. Synonym clues
The author uses a word with a similar meaning nearby. This is a synonym clue.
The hikers were famished. They were so hungry they ate all their snacks in five minutes.
Famished and hungry are synonyms. Signal words include or, also, like and the same as.
3. Antonym clues
The author uses a word with the opposite meaning. This is an antonym clue.
Unlike his gregarious sister, who loved parties, Omar was shy and quiet.
Shy and quiet is the opposite, so gregarious means friendly and social. Signal words: but, however, unlike, instead, although, on the other hand.
4. Example clues
The author gives examples that show the meaning. This is an example clue.
Our class studied precipitation, such as rain, snow, sleet and hail.
All the examples fall from the sky as water, so precipitation means water falling from clouds. Signal words: such as, for example, including, like, for instance.
5. Inference clues
There is no single helpful word. In an inference clue, you must use the general meaning of the passage and your own knowledge.
After running the marathon, Jess was so fatigued that she fell asleep in the car before it even left the parking lot.
Running a long race and falling asleep suggest that fatigued means very tired.
A strategy you can use every time
- Stop at the unknown word. Do not skip it.
- Reread the sentence and the ones before and after.
- Look for signal words: commas, or, but, such as, unlike.
- Decide what kind of clue it is.
- Predict a meaning in your own words.
- Substitute your meaning into the sentence. Does it make sense?
- Confirm with a dictionary if the word is important or you are still unsure.
Worked examples
Example 1: The arid desert gets less than ten centimetres of rain a year.
Clue type: inference (little rain). Meaning: very dry.
Example 2: Maple trees are deciduous, which means they lose their leaves each fall.
Clue type: definition (which means). Meaning: losing leaves each year.
Example 3: Although the first puzzle was simple, the second was quite intricate.
Clue type: antonym (although … simple). Meaning: complicated, with many parts.
Example 4: The museum displayed artifacts, including ancient coins, tools and jewellery.
Clue type: example. Meaning: objects made by people long ago.
Example 5: The puppy was lethargic, or sluggish, after his vaccination.
Clue type: synonym (or sluggish). Meaning: slow and without energy.
When context clues are not enough
Context clues give you a good idea of a word’s meaning, but not always the exact meaning. Sometimes the context is too thin: She looked at the ornate box. You know it is a description of the box, but not much more. In that case:
- Look at word parts (prefixes, suffixes, roots).
- Use a glossary or dictionary.
- Ask a classmate or teacher.
Context clues and word parts work best together.
Context clues in nonfiction
Nonfiction authors often help you on purpose. Watch for:
- Bold words with definitions right after them.
- Parentheses that explain: The cheetah is a carnivore (meat eater).
- Captions and diagrams that show what a word means.
- Glossaries at the back.
Common mistakes
- Skipping the word. You lose meaning and miss a chance to grow your vocabulary.
- Choosing a meaning that does not fit. Always substitute and check.
- Ignoring signal words. But and unlike flip the meaning; or and such as support it.
- Only reading one sentence. The best clue is often nearby, not right next to the word.
- Trusting a guess on a key word. For important words in a test question or science text, confirm with a dictionary.
Try it yourself
Identify the clue type and meaning.
- The new student was reticent; unlike the others, she rarely spoke in class.
- Reptiles, such as snakes, lizards and crocodiles, are ectothermic animals. (Hint: what do these animals have in common with their body heat?)
- The road was so treacherous, full of ice and sharp turns, that the bus driver went very slowly.
- A botanist, a scientist who studies plants, visited our class.
Answers: 1. Antonym; quiet, not willing to talk. 2. Example plus inference; cold-blooded, depending on the environment for heat. 3. Inference/example; dangerous. 4. Definition; a plant scientist.
Study tip
Keep a “word collector” page in your notebook. Each time you figure out a word using context, write the word, the sentence, the clue type and your meaning. Review it weekly and try using the words in your own writing.
Quick recap
- Context clues are hints in surrounding text that reveal a word’s meaning.
- Five types: definition, synonym, antonym, example and inference.
- Signal words point to the type of clue.
- Predict, substitute and check your meaning.
- Use word parts and a dictionary when context is not enough.