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That's what it means!
Applying word meanings
Remember when
Way back when...
100

This prefix means equal

What is equi

100

Sol means this.

What is sun?
100

In Dr. Strange and the Multiverse the Marvel characters battle between many universes. This part of multiverse means many.

What is multi?

100

This prefix means two

What is bi?

100

Pod and ped both mean this.

What is foot?

200

This prefix means half

What is demi/semi/hemi?

200

Cent means this.

What is hundred?

200

A century is this many years.

What is 100?

200

In the word tricycle, which part of the word means 3?

What is tri?

200

This root means "over or excessive".

What is "hyper"?

300

This prefix means many.

What is multi

300

Equi means this.

What is equal?

300

A semicircle is cut into two equal parts. This part of the word semicircle tells you it is a half of a circle.

What is semi?

300

Quad means this.

What is four?

300

This is the largest known shark ever to exist.

What is the Megalodon?

400

This prefix means thousand

What is kil?

400

Multi means this.

What is many?
400

Our solar system is called the Milky Way. This part of solar means sun.

What is sol?
400

The government building is called the pentagon because it has this many sides.

What is 5?

400

A person who regrets their actions would act this way.

Apologetically

500

This prefix means all

What is omni?

500

These are THREE prefixes for half. 

What are semi, demi, and hemi?
500

If the point of view in text is third person, the narrator is omniscient. This means they see all. Which part of omniscient means all?

What is omni?

500

An octopus has this many arms because oct has the same meaning.

What is 8?
500

A synonym is ...

What is a word that means the same?