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The Prefix un-

Spell words using the prefix un- to change meaning; understand that un- creates opposites or reverses actions

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What a learner can do afterwards

  • Spell words with un- prefix correctly (e.g. 'unhappy', 'unfair', 'undo')
  • Explain how un- changes the meaning of a word
  • Create new words by adding un- to known words

The lesson

Un- is a small word part called a prefix. It goes at the very front of a word. Adding un- flips a word to mean the opposite.

un+happy=unhappy
un- joins happy to make unhappy: not happy.
Try it together

Ben says the game is unfair. He means the game is not fair. Adding un- to fair made a new word.

Good to know

When you spell un- words, keep the whole word the same. Just add the letters u and n to the front.

un- goes at the front of a word. It flips the meaning to the opposite.

Watch it

Where it sits

Then practise

8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.

The Prefix un- · English, ages 5 to 6 · LightMySky