Cent/Ante
Com/Anti
Con/Auto
Counter/Bi
De/Circum
100

Cent

What is 100?

100

Com

What is with?

100

Con

What is together or with?

100

Counter

What is against?

100

De

What is down?

200

One one-hundredth of a meter.

What is a centimeter?

200

A person who is frequently with another person.

What is a companion?

200

To establish a link.

What is to connect?

200

To act in opposition (against) something.

What is counteract?

200

To go from a higher to a lower place.

What is to descend?

300

A period of 100 years.

What is a century?

300

The act of conforming (agreeing to).

What is compliance?

300

To combine; unite.

What is conjoin?

300

Working to stop the enemies' attempts to gain information.

What is counterintelligence?

300

To cause something to become inactive; take down/stop.

What is deactivate?

400

A room located outside another larger room.

What is an anteroom?

400

Stops the growth of, or destroys, bacteria.

What is an antibiotic?

400

A passenger vehicle operated by one person.

What is an automobile?

400

A vehicle with two wheels

What is a bicycle?

400

To maneuver around in a circular path.

What is to circumnavigate?

500

An event that happens before another event.

What is an antecedent?

500

Unwilling or unable to associate with other in a normal way.

What is antisocial?

500

The biography of a person's life, written by that person.

What is an autobiography?

500

A lens with two parts, one for near and one for far vision.

What is a bifocal?

500
To go around or bypass; to avoid.

What is to circumvent?

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