Adding the prefix un-
Learn about how to add the prefix un- to make new words.
This lesson includes:
one video explaining how to use the prefix un-
Prefixes are a group of letters that change the meaning of a word when they are added to the start.
The prefix un- usually means not, so the new word means the opposite of the original.
- unkind means ‘not kind’
- unhappy means 'not happy'
- unlocked means 'not locked'
In this Teacher Talk, Mr Smith explains all about how to use the prefix un- and shows you some examples.
Watch, listen carefully and join in with the activities.
You may need paper and a pen or pencil for some of these activities.
Let’s add un-!
Write out the words below adding un- to the start.
Then explain what the new word means.
The first one has been done for you:
1. certain = uncertain
This means not certain
2. sure =
3. happy =
4. tidy =
5. well =
You can check your answers using this answer sheet.
Let’s sort some words!
You cannot add un- to every word.
Read the words in the quiz. Click on the ones that you can add the prefix un- to.
Say the new word out loud. Does it sound right?
Let’s write some sentences!
Below is a list of five words you can add un- to.
Choose three words and add the prefix un- to them.
Now write three sentences using those words.
For example: It is unbelievable that you saw an alien!
Don’t forget to start your sentence with a capital letter and end it with a punctuation mark.