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When you add the prefix -un to the root word happy, you get __________.
unhappy
The root word do becomes __________ when the prefix -un is added to it.
undo
What word do you get when you combine the prefix -un with the root word kind? __________.
unkind
If you add the prefix -un to the root word lock, the new word is __________.
unlock
The word __________ is formed by adding the prefix -un to the root word familiar.
unfamiliar