- mercado (masculine) negro, estraperlo (masculine) (especially Spain/especialmente España) to buy/sell sth on the black market comprar/vender algo en el mercado negro the black market in foreign exchange el mercado negro or (especially Latin America/especialmente América Latina) paralelo de divisas (before noun/delante del nombre) black market goods/cigarettes del mercado negro or (especially Latin America/especialmente América Latina) paralelo
Here is a selection of useful words and phrases you will need in real-life situations while you're visiting Spain and other Spanish-speaking countries...
Did you know that the primary meaning of almuerzo is lunch? It is used only in this sense in most of Latin America. In Spain and Mexico, where comida is the usual word for lunch, almuerzo can also be a mid-morning snack.