SCRAP is material that is discarded as worthless or sold to be reused as parts; junk; a small unusable amount of something that is left over after the rest has been used or consumed.
LIQUID is to be in a state of liquidity, i.e., maintain sufficient assets in the form of cash or assets easily convertible to cash to satisfy current liabilities. When speaking of money or an economy: being very liquid means it is driven by primarily by cash, checking/saving accounts, treasury bills, stocks and bonds, etc; while being very illiquid means it is driven primarily by human capital.
FLAT INTEREST refers to charging interest on the full original loan amount, rather than on the declining balance. With group based loans, for example, a common "interest rate" is "3% per month, flat, for 4 months". This means that a $100 principal amount lent is multiplied by 3%, and then by 4 months to come up with $12 in interest. Thus, $112 would be repaid over 4 months in equal installments.
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