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Understand and Spell Words with the Prefix un-

In this worksheet, students consider the meaning of words with the prefix un- and practise spelling them.

'Understand and Spell Words with the Prefix un-' worksheet

Key stage:  KS 1

Curriculum topic:   Writing: Transcription

Curriculum subtopic:   Use the Prefix -un

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

A prefix is a letter or group of letters added to the beginning of a word. Knowing what a prefix means can help us to understand new words.

 

For example, the prefix un- means 'not'.

Someone who is unhappy is not happy.

Add the prefix un- to the word below to make a new word.

 

able

Add the prefix un- to the word below to make a new word.

 

tidy

Add the prefix un- to the word below to make a new word.

 

lucky

Add the prefix un- to the word below to make a new word.

 

usual

Add the prefix un- to the word below to make a new word.

 

equal

Add the prefix un- to the word below to make a new word.

 

tie

Add the prefix un- to the word below to make a new word.

 

popular

Add the prefix un- to the word below to make a new word.

 

well

The letters un- at the beginning of a word are sometimes part of the word itself and not a prefix.

For example, underground is not the opposite of derground!

 

Un- is a prefix in two of the words below. Work out which ones by taking away the first two letters and seeing if you end up with a word that means the opposite.

 

Tick the two words where un- is a prefix.

until

understand

unfair

unwilling

Again, un- is a prefix in only two of the words below.

 

Tick the two words where un- is a prefix.

uncle

unlikely

uncertain

under

  • Question 1

Add the prefix un- to the word below to make a new word.

 

able

CORRECT ANSWER
unable
EDDIE SAYS
A prefix means that it goes at the start of the word. The 'pre' in 'prefix' tells us that it should go before the root word. Well done for giving this a go.
  • Question 2

Add the prefix un- to the word below to make a new word.

 

tidy

CORRECT ANSWER
untidy
EDDIE SAYS
How did you get on? Putting the prefix 'un' in front of tidy changes the meaning. if something is 'untidy' it means it is no longer tidy.
  • Question 3

Add the prefix un- to the word below to make a new word.

 

lucky

CORRECT ANSWER
unlucky
EDDIE SAYS
Keep up the super effort. Did you remember? The prefix goes at the start of the word to change the meaning. 'Un' means 'not' so the person is no longer lucky. Give the next question a go.
  • Question 4

Add the prefix un- to the word below to make a new word.

 

usual

CORRECT ANSWER
unusual
EDDIE SAYS
Have you got the hang of this now? The prefix should always go in front of the word. Amazing effort well done!
  • Question 5

Add the prefix un- to the word below to make a new word.

 

equal

CORRECT ANSWER
unequal
EDDIE SAYS
If something is 'unequal' it means it is no longer equal. It has not be shared fairly. What a superstar you are, keep trying!
  • Question 6

Add the prefix un- to the word below to make a new word.

 

tie

CORRECT ANSWER
untie
EDDIE SAYS
How did you get on? If you 'untie' something then you undo it. Nearly there now! You have got this!
  • Question 7

Add the prefix un- to the word below to make a new word.

 

popular

CORRECT ANSWER
unpopular
EDDIE SAYS
Remember a prefix is a word part that is based in front of a root word. Adding 'un' to the start of a word changes the meaning to the opposite.
  • Question 8

Add the prefix un- to the word below to make a new word.

 

well

CORRECT ANSWER
unwell
EDDIE SAYS
Have you become an expert now? The prefix is added to the start of the root word 'well'. A new word is then created 'unwell'. If someone is 'unwell' then they are not feeling very well.
  • Question 9

The letters un- at the beginning of a word are sometimes part of the word itself and not a prefix.

For example, underground is not the opposite of derground!

 

Un- is a prefix in two of the words below. Work out which ones by taking away the first two letters and seeing if you end up with a word that means the opposite.

 

Tick the two words where un- is a prefix.

CORRECT ANSWER
unfair
unwilling
EDDIE SAYS
Although the letters 'un' are included in all of the words, only two have been added as prefixes. Both 'fair' and 'willing' are root words. They are separate words on their own.
  • Question 10

Again, un- is a prefix in only two of the words below.

 

Tick the two words where un- is a prefix.

CORRECT ANSWER
unlikely
uncertain
EDDIE SAYS
Did you get it correct? Again here you need to look for which words can be separate words on their own when the prefix 'un' is taken away. Both 'certain' and 'likely' are words. Adding 'un' to the start of the word changes their meaning to mean the opposite. Super effort!
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