Definition
Sentence
Synonym
Antonym
100

Not allowing fluid to pass through

Impervious

100

It is absolutely necessary to have the ability to read and write in today's society.

Vital

100

maintain

sustainable

100

Specific or detailed

generalize

200
stating a belief or feeling confidently 

Assert

200

It was difficult to see the solar _________ during that time. 

Eclipse

200

Review or scan 

Scrutinize

200

stay or stop 

befall

300

allowing light to pass through

Translucent

300

The picture on the refrigerator door made me feel extremely ___________. 

Nostalgic

300

Standard 

Qualitative

300

block or hinder

Facilitate 

400

unity or agreement 

Solidarity

400

She was the most important person in the room. 

Momentous

400

Almighty 

Omnipotent 

400

unmeasurable or insignificant

quantitative

500

Producing much fruit or work 

Prolific

500

This part of the season is the most exciting. 

Latter
500

Idea or concept

Notion 

500

agree, confirm, testify 

contradict