Compare movement forward or away with time before or after and ideas in opposition.
8 targets with matrices3 core roots revisited11 mastery checks
THE GIST
The idea behind these word parts
Prefixes can place events in time or show opposition. Pre- means before; post- means after.
Go deeper · how the parts work in context
Predict joins pre- before with dict say. Prewar and postwar hold the base war constant while changing when something happens. Identify the reference event before interpreting the time relationship.
pre + dict → predict
Before the vote, the writer tried to predict its result.
Predict means say what one thinks will happen.
Word parts suggest a meaning; the sentence helps confirm it. If the clues are not enough, check a dictionary.
EXPLORE THE WORD PARTS
Meaning, connections, and practice
Choose a word part. Read its gist, explore its map and matrix, then answer its three checks. Open the extra explanation whenever you need it.
How to use a matrix
Leading part + base + ending → word. Choose cells from left to right. Only paths that make one of the listed words are enabled. ∅ means no part is added.
The center can be a root or a whole word. Some cells contain combining forms or grouped endings. Related bases can change spelling, as in scribe/script or mit/miss; follow the spelling notes.
Keep a word for comparison, then select another word to see which parts and meanings changed.
01
dis-
apart
The gist: disconnect means separate a connection. The clue dis- connects it to apart.
Why it works · examples & details
The shared clue is the meaning of the leading part: apart. Compare disconnect (separate a connection) with disassemble (take apart). The complete word’s definition is more specific than the word-part clue.
dis + connect → disconnect Separate a connection.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore dis- · map, matrix & checks
disconnectseparate a connection
disassembletake apart
Prefix connections map: dis-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
dis-apart
dis + connect
Separate a connection.
dis + assemble
Take apart.
dis + jointverb
To separate at a joint.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with dis- 3 word paths
dis-: apart. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
dis + connect → disconnect
Separate a connection.
What changed?
Starting word
Selected word
Compare two paths
disconnect: Separate a connection. disjoint: To separate at a joint.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
dis + connect
disconnect
Separate a connection.
dis + assemble
disassemble
Take apart.
dis + joint
disjoint
To separate at a joint.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
02
pro-
forward
The gist: proceed means go forward. The clue pro- connects it to forward.
Why it works · examples & details
The shared clue is the meaning of the leading part: forward. Compare proceed (go forward) with propel (drive forward). The complete word’s definition is more specific than the word-part clue.
pro + ceed → proceed To continue or go forward. It works as a verb in this example.
In a sentence: Officials allowed removal to proceed despite serious objections to the treaty.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore pro- · map, matrix & checks
proceedgo forward
propeldrive forward
Prefix connections map: pro-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
pro-forward
pro + ceedverb
To continue or go forward.
Officials allowed removal to proceed despite serious objections to the treaty.
pro + pelverb
To push or drive something forward.
Violence in Mexico and hopes of work could propel families toward El Norte.
pro + jectverb
To estimate or imagine something in the future.
Population trends allowed writers to project a future in which no single group would remain the majority.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with pro- 3 word paths
pro-: forward. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
pro + ceed → proceed
To continue or go forward.
verb
Officials allowed removal to proceed despite serious objections to the treaty.
What changed?
Starting word
Selected word
Compare two paths
proceed: To continue or go forward. project: To estimate or imagine something in the future.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
pro + ceed
proceed
To continue or go forward.
pro + pel
propel
To push or drive something forward.
pro + ject
project
To estimate or imagine something in the future.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
03
ad-
toward or to
The gist: adhere means stick to something. The clue ad- connects it to toward or to.
Why it works · examples & details
The shared clue is the meaning of the leading part: toward or to. Compare adhere (stick to something) with attract (pull toward). The complete word’s definition is more specific than the word-part clue.
at + tract → attract To draw someone or something toward a place or goal. It works as a verb in this example.
In a sentence: Tobacco profits helped attract English settlers to Virginia.
Meaning & spelling: Before some consonants, ad- changes form, as in at- + tract.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore ad- · map, matrix & checks
adherestick to something
attractpull toward
Prefix connections map: ad-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
ad-toward or to
ad + here
Stick to something.
at + tractverb
To draw someone or something toward a place or goal.
Tobacco profits helped attract English settlers to Virginia.
ad + joinverb
To join onto or be next to something.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with ad- 3 word paths
ad-: toward or to. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
ad + here → adhere
Stick to something.
What changed?
Starting word
Selected word
Compare two paths
adhere: Stick to something. adjoin: To join onto or be next to something.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
ad + here
adhere
Stick to something.
at + tract
attract
To draw someone or something toward a place or goal.
ad + join
adjoin
To join onto or be next to something.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
04
pre-
before
The gist: preview means view before. The clue pre- connects it to before.
Why it works · examples & details
The shared clue is the meaning of the leading part: before. Compare preview (view before) with preheat (heat beforehand). The complete word’s definition is more specific than the word-part clue.
pre + dict → predict To state what is likely to happen. It works as a verb in this example.
In a sentence: Planters could not reliably predict that students would accept plantation inequality after learning democratic ideals.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore pre- · map, matrix & checks
previewview before
preheatheat beforehand
Prefix connections map: pre-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
pre-before
pre + view
View before.
pre + heat
Heat beforehand.
pre + dictverb
To state what is likely to happen.
Planters could not reliably predict that students would accept plantation inequality after learning democratic ideals.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with pre- 3 word paths
pre-: before. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
pre + view → preview
View before.
What changed?
Starting word
Selected word
Compare two paths
preview: View before. predict: To state what is likely to happen.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
pre + view
preview
View before.
pre + heat
preheat
Heat beforehand.
pre + dict
predict
To state what is likely to happen.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
05
post-
after or behind
The gist: postgame means after the game. The clue post- connects it to after or behind.
Why it works · examples & details
The shared clue is the meaning of the leading part: after or behind. Compare postgame (after the game) with postscript (writing added after the main text). The complete word’s definition is more specific than the word-part clue.
post + war → postwar Occurring after a war. It works as a adjective in this example.
In a sentence: Postwar struggles tested whether wartime service would lead to equal rights.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore post- · map, matrix & checks
postgameafter the game
postscriptwriting added after the main text
Prefix connections map: post-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
post-after or behind
post + game
After the game.
post + script
Writing added after the main text.
post + waradjective
Occurring after a war.
Postwar struggles tested whether wartime service would lead to equal rights.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with post- 3 word paths
post-: after or behind. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
post + game → postgame
After the game.
What changed?
Starting word
Selected word
Compare two paths
postgame: After the game. postwar: Occurring after a war.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
post + game
postgame
After the game.
post + script
postscript
Writing added after the main text.
post + war
postwar
Occurring after a war.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
06
contra-
opposite or against
The gist: contradict means speak against. The clue contra- connects it to opposite or against.
Why it works · examples & details
The shared clue is the meaning of the leading part: opposite or against. Compare contradict (speak against) with contrast (set things opposite to show differences). The complete word’s definition is more specific than the word-part clue.
contra + dict → contradict To oppose a statement or show that it cannot be fully true. It works as a verb in this example.
In a sentence: Evidence of Native farming could contradict the claim that Native people did not work the land.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore contra- · map, matrix & checks
contradictspeak against
contrastset things opposite to show differences
Prefix connections map: contra-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
contra-opposite or against
contra + dictverb
To oppose a statement or show that it cannot be fully true.
Evidence of Native farming could contradict the claim that Native people did not work the land.
contra + st
Set things opposite to show differences.
contra + indicateverb
To show a reason against a proposed treatment.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with contra- 3 word paths
contra-: opposite or against. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
contra + dict → contradict
To oppose a statement or show that it cannot be fully true.
verb
Evidence of Native farming could contradict the claim that Native people did not work the land.
What changed?
Starting word
Selected word
Compare two paths
contradict: To oppose a statement or show that it cannot be fully true. contraindicate: To show a reason against a proposed treatment.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
contra + dict
contradict
To oppose a statement or show that it cannot be fully true.
contra + st
contrast
Set things opposite to show differences.
contra + indicate
contraindicate
To show a reason against a proposed treatment.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
07
anti-
against
The gist: antiwar means opposed to war. The clue anti- connects it to against.
Why it works · examples & details
The shared clue is the meaning of the leading part: against. Compare antiwar (opposed to war) with antifreeze (works against freezing). The complete word’s definition is more specific than the word-part clue.
anti + colonial → anticolonial Opposing colonial rule. It works as a adjective in this example.
In a sentence: Anticolonial resistance challenged the taking of Native land.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore anti- · map, matrix & checks
antiwaropposed to war
antifreezeworks against freezing
Prefix connections map: anti-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
anti-against
anti + war
Opposed to war.
anti + freeze
Works against freezing.
anti + colonialadjective
Opposing colonial rule.
Anticolonial resistance challenged the taking of Native land.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with anti- 3 word paths
anti-: against. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
anti + war → antiwar
Opposed to war.
What changed?
Starting word
Selected word
Compare two paths
antiwar: Opposed to war. anticolonial: Opposing colonial rule.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
anti + war
antiwar
Opposed to war.
anti + freeze
antifreeze
Works against freezing.
anti + colonial
anticolonial
Opposing colonial rule.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
08
ab-
away
The gist: abduct means lead or carry away. The clue ab- connects it to away.
Why it works · examples & details
The shared clue is the meaning of the leading part: away. Compare abduct (lead or carry away) with abstain (hold oneself away from an action). The complete word’s definition is more specific than the word-part clue.
ab + norm + al → abnormal Different from an accepted standard or usual pattern. It works as a adjective in this example.
In a sentence: Calling protest abnormal can protect the unequal conditions that protesters challenge.
Meaning & spelling: The prefix may appear as abs- before some bases.
The map and matrix show established words. Matching letters alone do not prove a meaningful relationship.
Explore ab- · map, matrix & checks
abductlead or carry away
abstainhold oneself away from an action
Prefix connections map: ab-
Compare this beginning across different bases. These words share a leading part; they do not necessarily share a root. Select a word to load its path in the matrix below.
Read the family first.
ab-away
ab + duct
Lead or carry away.
abs + tain
Hold oneself away from an action.
ab + norm + aladjective
Different from an accepted standard or usual pattern.
Calling protest abnormal can protect the unequal conditions that protesters challenge.
Explain the connection: “These words share ___. In ___ it helps mean ___; in ___ it helps mean ___.”
Build with ab- 3 word paths
ab-: away. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
ab + duct → abduct
Lead or carry away.
What changed?
Starting word
Selected word
Compare two paths
abduct: Lead or carry away. abnormal: Different from an accepted standard or usual pattern.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
ab + duct
abduct
Lead or carry away.
abs + tain
abstain
Hold oneself away from an action.
ab + norm + al
abnormal
Different from an accepted standard or usual pattern.
Check your understanding
Use the map and matrix as needed. A wrong answer gives you a clue; try again or open the explanation.
0 of 3 answered correctly
DECODE · FOLLOW THE CLUES
Use the clue without overtrusting it
A word part gives you a strong clue—not always a complete definition.
Spot the part.Underline the exact letters you recognize.
Recall the clue.Say the meaning you learned for that part.
Test the whole word.Combine the clue with the other parts and the sentence.
Decode disassemble
Spot disassemble. The leading word part dis- carries the clue apart. Here, it helps you understand: take apart.
Decode propel
Spot propel. The leading word part pro- carries the clue forward. Here, it helps you understand: drive forward.
Decode attract
Spot attract. The leading word part ad- carries the clue toward or to. Here, it helps you understand: pull toward.
Compare the meanings, then test which form fits the sentence.
prewar
before a war
postwar
after a war
Explain the difference
War stays the same. Pre- and post- locate something on different sides of the event in time.
A common mistake—and how to avoid it
Dis- has several senses, including apart, not, and reversal. Disconnect reverses or separates a connection. Learn the whole word’s meaning with the prefix clue.
REVIEW · BRING ROOTS BACK
Keep these roots working
Before opening each matrix, recall the root’s meaning. Build the review words, then explain the whole word. These core roots return in later lessons with new word forms.
Some review words use today’s affixes; others bring back an earlier pattern. Not every affix can attach to every root.
duce / duct: lead. Choose parts from left to right, or choose a word below. Dimmed choices do not continue a word in this matrix.
Prefix / leading part
Root or whole base
Suffix / ending
pro + duce → produce
To make, create, or bring about something.
verb
Plantation owners depended on workers to produce crops for sale.
What changed?
Starting word
Selected word
Compare two paths
produce: To make, create, or bring about something. productivity: The amount produced in relation to the time or resources used.
Say which parts stay and which change. Explain how the meaning or word job changes.
Read every word sum and meaning
Word sum
Word
Meaning
pro + duce
produce
To make, create, or bring about something.
pro + duct + ion
production
The process of making goods or creating something.
pro + duct + ive
productive
Producing useful results or substantial output.
pro + duct + ive + ity
productivity
The amount produced in relation to the time or resources used.
Use it: Write one sentence about history using a review word. Underline its root, circle its affixes, and explain why that word fits your sentence.
QUICK QUIZ · RECALL & APPLY
Recall the parts. Apply the pattern.
Check every target, then complete three applied questions. If you miss one, revisit its matrix and try again. Finish with the new-word challenge below.
CHECK IN CONTEXT
Make sense of a new word
Use both the word parts and the sentence. Open a hint if you need a starting point.
The editor corrected the errors before the book went to print, during the prepublication review.
Expand your thinking · explain it or use itCheck your sentence
Does the word’s established meaning fit your idea?
Does its form fit the grammar of your sentence?
Can you identify a meaningful part and explain its contribution?
These optional notes are not saved, graded, or submitted.
COME BACK · RETRIEVE IT AGAIN
Remember after a break
Return in two days, then about a week later. Before opening the notes, recall a meaning, rebuild two words, and use one in a new sentence.
Start with dis-. What does it mean? Which two words connect to it?
Check after you recall
dis-: apart. For example: disconnect and disassemble. Explain how each connects to the meaning.
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