Lesson 1
Lesson 2
Lessons 1-4
Lesson 3
Lesson 4
100

To push or shove

Jostle

100

Easily broken; not flexible

Brittle

100

Something that prevents one from moving forward.

Obstacle

100

Choice or something that is available as a choice.

Option

100

To leave; to go away from a place.

Depart
200
A person who is walking; someone traveling on foot.

Pedestrian

200

to use up.

to eat or drink.

to do away with or destroy.

Consume

200
Weak 

Lacking in size, strength, or power.

Puny

200

Too early; happening or arriving before the proper time.

Premature
200

The apparent line in the distance where the sky meets the sea or land.

Horizon

300

Big and strongly built.

Burly

300

To prepare land for the growing of crops.

To grow or to help to grow.

To encourage development by attention or study.

Cultivate

300
To send goods to another country for sale.

Export

300

A person from whom one is descended.

An early kind of animal from which later ones have developed; a forerunner.

Ancestor

300

A long journey by sea or in space.

To make a journey by sea or in space.

Voyage

400

To make familiar.

Usual.

Used to.

Accustom

400

To cause to know; to make known by name.

To bring to the attention of, especially for the first time. 

To bring into use.

Introduce

400

A longing for a certain time in the past.

Nostalgia

400
Easy to see and understand; obvious, clear.

Evident

400

To make or become strong again.

To bring back into use or fashion.

Revive

500

To draw one's thoughts or attention away from the subject at hand. 


Distract

500

To remove or take out.

To obtain with an effort.

Something removed or taken out.

Extract

500

Not exact, but close enough to be reasonably correct.

Approximate

500

To cover up or keep from being seen. 

Hard to see; hidden.

Not easy to understand

Obscure
500

To make or become worse.

Deteriorate

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