B. Foundations of Language · Foundations: Speaking, Listening, Words and Fluency

Word Detective: Figuring Out New Words with Context and Word Parts

B2.2 B2.1 A1.2About 45 minutes

Learning goals

I can use different kinds of context clues to figure out unfamiliar words.
I can combine context clues with word parts to make a strong prediction about meaning.
I can notice morphology traps, like prefixes that don't mean what I expect.
I can check a meaning and choose the right definition from a dictionary.

Words to know

context
The words, sentences and pictures around an unfamiliar word.

context clue
A hint in the context that helps you figure out a word's meaning.

appositive
A word or phrase right beside a noun that renames or explains it, often set off by commas or dashes.

antonym clue
A clue that shows a word means the opposite of something nearby, often signalled by but, unlike or however.

nuance
A small but important difference in meaning or feeling between similar words.

etymology
The history of a word: where it came from and how its meaning changed.

Remember from earlier grades

You've used context clues for years, and in Grade 5 you used a thesaurus and learned about connotation (the feeling a word carries). In Grades 5 and 6 you used word parts to read long words. In Grade 7, you'll combine these tools on purpose and learn to spot the times when word parts fool you.

Let's start with a puzzle

Read this sentence: "Because the old shed was full of oily rags, the firefighter warned that it was highly inflammable."

If you peel it: in- often means not, so inflammable must mean not able to burn... right?

Wrong! In this word, in- means into, as in inflame (to set on fire). Inflammable means the same as flammable: easily set on fire. The context (oily rags, a firefighter's warning) tells you the truth. That's why word detectives use context and word parts together.

Four steps for a new word: 1 Context, 2 Parts, 3 Predict, 4 Check.

Kind of context clue	Signal words	Example
Definition	is, means, is called, refers to	A watershed* is an area of land where all the water drains into the same river or lake.*
Restatement or appositive	commas, dashes, brackets, or, that is	They made a portage, or carried their canoes over land, between the two lakes.
Synonym	also, like, similarly	The hike was arduous; it was also exhausting.
Antonym or contrast	but, unlike, however, instead of	Unlike the tranquil* lake in the morning, the afternoon water was rough and choppy.*
Example	such as, including, for instance	Many deciduous* trees, such as maples and oaks, lose their leaves in fall.*
Cause and effect	because, so, as a result	Because the bridge was unstable, the town closed it until repairs were done.
General sense (inference)	no signal word; use the whole passage	After three days without rain, the parched* garden had cracked, dry soil and drooping plants.*

Seven kinds of context clues. Signal words help you spot them.

Morphology traps

Word parts are powerful, but a few words trick you:

in- can mean not (invisible, inactive) or into/in (inflammable, inhale, insight).
Invaluable does not mean worthless. It means so valuable you can't measure it. (Her advice was invaluable.)
Infamous does not mean not famous. It means famous for something bad.
Unravel and ravel can both mean to come apart.

When word parts and context disagree, trust the context, then check a dictionary.

The prefix in- has two different meanings. Inflammable belongs on the right, which is why the context clues matter.

Choosing the right dictionary definition

Many words have several definitions. Read all of them, then choose the one that fits the sentence and the subject. Try it by substituting the definition into the sentence: if the sentence still makes sense, you've chosen well. The etymology (word history) at the end of a dictionary entry can also show you the root.

Notice the nuance

Similar words can carry different feelings or strengths. The speaker was confident (positive) vs. The speaker was arrogant (negative). Chilly, cold, frigid get stronger each time. Context helps you see which nuance the author chose, and why.

Worked example

Let's be word detectives

Read this passage and figure out the bold words:

"The canoe trip began on a placid lake, so smooth it looked like glass. By afternoon, though, the wind had picked up, and the guide warned that the next stretch of river was perilous: fast water, hidden rocks and a waterfall ahead. Luckily, her map was invaluable; it showed a safe trail around the falls."

placid: Context clue: restatement (so smooth it looked like glass) and contrast (though, the wind had picked up). Prediction: calm, still. Check: a calm lake fits.
perilous: Context clue: example (fast water, hidden rocks and a waterfall) after a colon, plus warned. Word part: peril (danger) + -ous (full of). Prediction: full of danger. Check: a dangerous stretch of river fits.
invaluable: Word parts suggest not valuable, but context says the map showed a safe trail, which is very helpful. Trust the context: extremely valuable. Check: a dictionary confirms it.
Reflect: For placid I used context only; for perilous I used context and parts; for invaluable the parts would have fooled me, so context saved me.

placid = calm; perilous = full of danger; invaluable = extremely valuable.

Just for fun

Fun fact: Because so many people thought inflammable meant "won't burn," safety experts began switching to the word flammable on warning labels about a hundred years ago. Context can save lives!

Read on, then reread

Sometimes the clue comes after the word, even in the next sentence. If you're stuck, read to the end of the paragraph, then come back.

Hands-on activity

Make your own context-clue cards

You need: 10 index cards or paper squares, a pencil, a dictionary (paper or online), and a partner.

Find 5 unfamiliar words in a novel, magazine or news article (or use these: meticulous, frugal, exuberant, obsolete, reluctant).
Look each one up. On the front of a card, write a sentence that uses the word with a context clue, using a different clue type each time (definition, appositive, synonym, contrast, example).
On the back, write the meaning and the clue type.
Swap with your partner. Guess the meaning from the context, then name the clue type.
Then try 'reverse detective': your partner gives you a word, and you must write a sentence with a contrast clue for it.

What to look for: each sentence really gives away the meaning (for example, Unlike his brother, who spends every cent, Jamal is frugal and saves most of his allowance), and the clue type is named correctly.

Your turn

Name the clue type: The archipelago, a group of islands, stretched across the bay.

What does tranquil mean? Unlike the noisy city, the cottage was tranquil.

Use the example clue: Many nocturnal animals, such as owls, raccoons and bats, hunt at night. What does nocturnal mean?

Does invaluable mean 'worth nothing'? Explain.

In inhale, does in- mean 'not' or 'into'?

Name the four steps for figuring out a new word.

Which is the most negative: thrifty, frugal, stingy?

More practice: warm-up

What is context?

Name two signal words for a contrast clue.

Name one signal word for an example clue.

What does infamous mean?

True or false: The clue for a word is always in the same sentence.

More practice: on your own

Figure out obsolete: Flip phones are almost obsolete; hardly anyone uses them now that smartphones are common.

Figure out meticulous and name the clue type: Leah is meticulous: she checks every measurement twice and labels every jar.

A dictionary gives three meanings of bank: (1) land beside a river, (2) a place that keeps money, (3) to tilt an airplane while turning. Which fits The pilot banked to the left? How do you know?

Write a sentence for reluctant with a cause-and-effect clue.

Explain why you should trust the context when it disagrees with word parts.

Challenge

Use parts and context: The scientists were skeptical of the claim because the company refused to share its data. Predict, then check with the clue.

Write two sentences using confident and arrogant that show the nuance between them.

Explain how the etymology of inflammable explains its meaning.

Check your understanding

Quiz

The nomadic family moved from place to place with the seasons. What does nomadic mean?

Which clue type uses such as?

What does inflammable mean?

Unlike her gregarious brother, Ana was quiet and liked to be alone. Gregarious means...

What should you do if word parts and context disagree?

Which word has the most negative nuance?

For parents and teachers

Big idea (B2.2, B2.1, A1.2): Grade 7 students use generalized morphological knowledge to analyze and understand new words in context. This lesson combines context clues, word parts and dictionary checking, and teaches students to notice morphology traps and nuance. Reflecting on which strategy worked is part of metacognition (A1.2).

How to help at home:

When your child asks what a word means, ask first: "What do the words around it tell you? What parts do you see?"
Share your own thinking aloud when you meet an unfamiliar word.
Play "which is stronger?" with word sets (warm, hot, scorching; like, love, adore).

Common difficulties:

Stopping at the word. Encourage reading to the end of the paragraph.
Choosing the first dictionary definition. Have them substitute each definition into the sentence.
Over-trusting word parts. Remember inflammable, invaluable, infamous.