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Re
Un
Ex
Sub
Pre
100

To play again.

What is replay?ffttttttttt

100
The opposite of lock.
What is unlock?
100
To breath out.
What is exhale?
100
A boat that goes under water.
What is a submarine?
100

To test before.

What is pretest?

200
To read again.
What is reread?
200
Not comfortable.
What is uncomfortable?
200
To leave out of a group.
What is exclude?
200
A passageway under the ground or underground railway.
What is subway?
200

To guess what happens before it happens.

What is predict?

300
To build again.
What is rebuild?
300
Not able to predict.
What is unpredictable?
300

No longer your girlfriend or boyfriend.

Ex-girlfriend/ Ex-boyfriend

300
To take away or make less.
What is subtract?
300
To look see before.
What is preview?
400
To nay something again.
What is repeat?
400
The opposite of zip.
What is unzip?
400
To go out in search of something.
What is explore?
400
Below zero.
What is subzero?
400
Before recorded history.
What is prehistoric?
500
To write again.
What is rewrite?
500
Not adventurous.
What is unadventurous?
500
To get rid of or destroy completely.
What is exterminate?
500
To hold under or put under water.
What is submerge?
500
To go before or come before something.
What is precede?