fils

In English, fils is usually the name of a small monetary unit used in several Arab countries. It is most often a subdivision of a dinar, though in some places it is also used with other currencies such as the dirham. When you read that an item costs "500 fils," the meaning is similar to saying it costs a certain number of cents: it refers to a fraction of the main unit of money rather than the main unit itself.

The exact fraction is not always the same from one country to another, so context matters. In many modern examples, 1,000 fils make one dinar, but usage depends on the local currency system. That is why the word often shows up in exchange tables, store receipts, transport fares, bank documents, and older coin descriptions. The term is especially common when people talk about currencies such as the Iraqi dinar, Jordanian dinar, Kuwaiti dinar, and Bahraini dinar.

There is also a separate French word fils meaning "son," and English readers may notice it in names like Dumas fils. But that is not the main everyday English use of the word as a vocabulary item on its own. In most modern English contexts, if you see fils without extra explanation, it is safest to read it as a money term tied to a specific national currency.