Other definitions of the term currency are discussed in their respective synonymous articles banknote, coin, and money. The latter definition, pertaining to the currency systems of nations, is the topic of this article. Currencies can be classified into two monetary systems: fiat money and commodity money, depending on what guarantees the value (the economy at large vs. the government's physical metal reserves).
Federal aid offers Direct subsidized and unsubsidized loans. The difference between these two loans is that subsidized loans are based on financial need and the interest does not accrue while the student is in college, as the interest is paid by the federal government.
To subsidize something is to support it by providing it with money or other resources. Don't expect your parents to subsidize your addiction to solid-gold puppy figurines. We can break down the word subsidize to help us remember its meaning. The prefix sub- means under, below and sedÄre means to sit.. (A submarine is a ship that goes under the sea.) So to subsidize is to underwrite something financially, providing the support that keeps it going. For example, our taxes are used by the government to subsidize many educational and social programs.