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Learn how little word parts at the start or end of a word can change what it means!
Did you know that English words are like building blocks? A long time ago, people started putting little pieces together to make new words. These pieces are called prefixes and suffixes. They have been used for hundreds and hundreds of years!
Let's look at how people have been learning about word parts over time.
Here is the big question: How can knowing little word parts help you read and understand big words? That is what this lesson is all about!
Before we jump in, let's learn three important words. A base word (or root word) is a word that can stand all by itself, like "happy" or "play." A prefix is a word part added to the beginning of a base word. A suffix is a word part added to the end of a base word. When you add a prefix or suffix, it changes what the word means!
Look at this picture! It shows how a prefix, a base word, and a suffix snap together like building blocks to make a bigger word.
See how that works? The word un + kind + ly all snap together. Each little part adds something to the meaning. When you see a long word, try to find these parts. It will help you read and understand the word!
When you see a big word you do not know, follow these easy steps. Think of it like being a word detective!
Step 1: Look for a prefix. Check the start of the word. Do you see un-, re-, pre-, or dis-? If you do, that is the prefix!
Step 2: Find the base word. What is left in the middle? Is it a word you already know? For example, in "redo," the base word is do.
Step 3: Look for a suffix. Check the end of the word. Do you see -ful, -less, -ly, -er, or -est? That is the suffix!
Step 4: Put it together! Think about what each part means. Then say the whole word out loud. You did it!
Here are some prefixes and suffixes you will see a lot. Try to remember what each one means. It will help you read many new words!
| Prefix | What It Means | Example |
|---|---|---|
| un- | not, the opposite | unhappy = not happy |
| re- | again | reread = read again |
| pre- | before | preheat = heat before |
| dis- | not, the opposite | dislike = not like |
| mis- | wrong, badly | misspell = spell wrong |
| Suffix | What It Means | Example |
|---|---|---|
| -ful | full of | joyful = full of joy |
| -less | without | hopeless = without hope |
| -ly | in a way | slowly = in a slow way |
| -er | more, or a person who | faster = more fast; teacher = one who teaches |
| -est | the most | tallest = the most tall |
| -ing | doing it now | playing = doing play now |
Let's decode the word "unhelpful" step by step.
Prefixes and suffixes are both word parts. But they are not the same! Let's see how they are different.
| PREFIX | SUFFIX | |
|---|---|---|
| Where does it go? | At the beginning | At the end |
| Does it change the spelling? | Usually no! Just snap it on. | Sometimes yes! (happy → happi + ness) |
| What does it do? | Often makes the word mean the opposite | Often changes what kind of word it is |
| Example | unkind | kindly |
Now that you know about prefixes and suffixes, you are ready for even more! As you get older, you will learn about root words from Greek and Latin. These are base words that come from other languages. For example, the root "aud" means "hear." That is why we say "audience" — people who hear a show!
| WHAT YOU KNOW NOW | WHAT YOU'LL LEARN LATER | |
|---|---|---|
| Word parts | Common prefixes and suffixes | Greek and Latin roots |
| Words you can decode | unhappy, replaying, kindness | telephone, microscope, invisible |
| How many parts? | 2 or 3 parts | Sometimes 4 or more parts! |
Every new prefix and suffix you learn is like getting a new key. Each key opens the door to lots of new words! Keep collecting keys and you will be a super reader. 🗝️
Try these five problems. Click "Show Answer" when you are ready to check your work. You can do it!
In this lesson, you learned that words are made of parts, just like building blocks! A prefix is a part added to the beginning of a word that changes its meaning. Common prefixes include un- (not), re- (again), pre- (before), dis- (not), and mis- (wrong). A suffix is a part added to the end of a word. Common suffixes include -ful (full of), -less (without), -ly (in a way), -er (more), -est (the most), and -ing (doing it now).
The base word is the main word in the middle that makes sense on its own. To decode a new word, be a word detective: find the prefix, find the base word, find the suffix, and put the meaning together. The more word parts you learn, the more words you can read all by yourself! Keep practicing — you are doing great! 🌟