Uni-
A bicycle that only has one wheel.
Unicycle
To appear again.
Reappear
Unable
To see before.
Preview
One color
Monochrome
To join or bring into one.
Unify.
To use again.
To remove the cover.
Uncover
To say before.
Predict
An eyeglass for one eye.
Monocle
Relating to the entire world or all things.
Universal.
To write again.
Rewrite
To not be aware.
Unaware
Prejudice
A single ruler.
Monarch
United States.
To view again.
Review
To remove the lock.
Unlock
To get ready before.
Prepare.
A railway system that uses only one rail.
Monorail.
A horse with one horn.
Unicorn.
To turn back.
Return
To not be comfortable.
Uncomfortable
To be cautious beforehard.
Precaution.
Has only one color or shade of color.
Monochrome