Root Definitions
Word Examples
Used in Context
Numbers
Word Detective
100

The meaning of the root, "hydro".

What is water?

100

What root meaning “fire or heat” is in the word pyrotechnics?

What is pyro?

100

Something that is not regular is ____.

What is irregular?

100

This root means one.

What is uni?

100

A century has how many years?

What is 100?

200

The meaning of the root, "a".

What is not or without?

200

What root meaning “earth” appears in the word geography?

What is geo?

200

A drawing that has many colors is _____. 

What is multicolored?

200

This root means two.

What is bi or di?

200

If something is asteroid-like, which root meaning “resembling” helps explain the word?

What is -oid?

300

The meaning of the root, "audi".

What is to hear or listen?

300

What root meaning “fragrant substance” appears in the word aromatic?

What is aroma?

300

A shy puppy who hid behind the couch because it was scared is ___.

What is timid?

300

This root means three.

What is tri?

300

A biweekly meeting happens how often?

What is two times per week or every two weeks?

400

The meaning of the root, "im".

What is not, without, or into?

400

This word means “a person who takes pictures" (name the word and the roots it contains)

What is a photographer (phot-, graph-, and -er)?

400

This type of scientist studies rocks and soil. 

What is a geologist?

400

This root means five.

What is pent?

400

If you transport something, what are you doing?

What is moving it or carrying it somewhere?

500

This root means “anger or rage”

What is ira-?

500

This word means "a device used to amplify one's voice" (name the word and roots it contains)

What is a microphone (phon-)?

500

A machine that turns on and off by itself is ____.

What is automatic?

500

This root means eight.

What is oct?

500

During the interview, the reporter asked the mayor to dictate a short statement for the newspaper. Based on the root, what does dictate most nearly mean?

What is “to say or speak something for someone to write down”?

M
e
n
u