What's the meaning of the prefix 'un-'?

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Welcome to EnglishRootAndAffix! Start with roots and affixes to understand words!

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Prompt Starters

1. Analyze the word 'photosynthesis'
2. Root-affix: 'bio-', give examples
3. What are synonyms of 'incredible'?
4. What's the meaning of the prefix 'un-'?
5. Quiz me on the last five words we discussed