Unit 1
Unit 2
Unit 3
Unit 5
Unit 6
100

how you make money

livelihood

100

first, earliest; different from anyone or anything that came before

original

100

important

significant

100

to change from a solid to a liquid, usually because of heat

melt

100

donations

charity

200

a big change

transformation

200

difficult to understand because of its many parts or details

complicated

200

to show or communicate

indicate

200

something that can be chosen instead of something else

alternative

200

a difficulty

barrier

300

relating to the past

historical

300

to hurt the feelings of someone with words or actions

offend

300

to find something by chance

come across

300

to give a rough measure of value, cost, size, etc.

estimate

300

a feeling that causes someone to keep buying from a company

customer loyalty

400

a thing that makes life easier

convenience

400

to respect, approve of, or look at with great pleasure

admire

400

to be an abbreviation or symbol for something

stand for

400

an idea of what something is or how it works

concept

400

to improve people's knowledge and understanding

raise awareness

500

to make practical use of

utilize

500

having the right qualities for a particular purpose or situation

suitable

500

not close to real life

abstract

500

a test of the quality, value, or usefulness of something

trial

500

possible

viable