These activity sheets will teach your students how to recognize and use prefixes correctly.

A prefix is a beginning root that modifies the meaning of a word. Prefixes in English usually come from both Latin and Greek, so the same exact form can have the same meaning. The most commonly used prefixes are un- and re-. When you want to reverse the use of a word or push to an opposite word the use of un- can really get the job deal for you. When you need something repeated or done over again the use of re- is very handy. Remember the base word (word root) spelling never changes when we use these. Also be aware that double letter spellings happen often when you are using these word parts. At first the new spelling will look incorrect, but you will get the hang of them the more you use them. When you use a prefix with a proper noun or number, you will be required to use a hyphen to separate them. The best way to learn the proper usage of these is to practice. What are you waiting for scroll down the page to get at it.

The following collection of worksheets will help your students learn what different root and word addends mean in order to use them correctly. Activities include assigning words from a given list to specific words, giving them meaning, changing words into their opposites, and more. Answer keys are provided. Note: Similar-sounding prefixes don't always mean the same thing. "Ante-" is from Latin which means "before," while "anti-" is from Greek that means "against."

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Printable Prefix Worksheets

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Prefixes In the World

A prefix is a word part that is added to the front of a base word to change its meaning. More than one prefix may mean the same thing.

Their Meanings

Circle the starter portion in each word. Then write the meaning of the word on the line.

Choose the Right One

You can change the meaning of a word by adding a prefix to it. Look at each base word below. Which word part is often added to it? Choose the correct one and write the new word on the line beneath.


Rewrite each sentence by adding a word part to the underlined word to change its meaning to its opposite.

Mix and Match!

Add a prefix to each base word to create new words. You may use each of the word parts more than once. Some words may take more than one.

The Prefix Dis-

The part dis- means "not." Write a single word that contains dis- to complete each sentence.

The Word Factory

Use a prefix to create a word that has the indicated meaning. Write your word on the line.

The Prefix Un-

The word starter un- means "not." The underlined the word in each sentence below that is incorrect; its opposite should be in its place. Correct each sentence by writing the correct word on the line. Use un-.

Words Under Construction

Circle the correct word parts that go with each word. Write the new word on the line.

Fill in to Complete

Complete the table by filling in a prefix that goes with the root word and writing a word that matches the meaning provided.

Word Adders

Add one of the parts below to each word to create a new word. Write the new word on the line.

Meanings of Word Starters

Circle the prefix in each word. Then match it to its correct meaning.

The Prefix Re-

A prefix is a word part that is added to the front of a base word to change its meaning. Adding re- changes the meaning of a word, so that it means to do (the base word) again.

Display and Find Me

Circle the word that contains the correct prefix.

Changing Meaning

A prefix is a word part that is added to the front of a base word. Every prefix has a meaning, and when you add one to a word, the meaning of the prefix changes the meaning of the word.