challenge – n. to test the ability, skill, or strength of (someone or something

quarter – n. a three-month period of the year

unstable – adj. not held in a secure position

stimulus – n. the act of putting money into the economy to help it

liquidity – adj. the state of having things that can be easily changed into money

confidence – n. a feeling or belief that you can do something well or succeed at something

ballistic missile – n. a weapon that is shot through the sky over a great distance and then falls to the ground and explodes