currency – n. the money that a country uses

manipulator – n. one who uses or controls other people in a clever and often unfair or selfish way

scarcity – n. a very small supply of something

adjustment – n. a small change that improves something or makes it work better

advantage – n. something (such as a good position or condition) that helps to make someone or something better or more likely to succeed than others

sustain – v. to provide what is needed for (something or someone) to exist, continue,