This is the 1186th most frequent Spanish word.
petróleo
Petroleum; a naturally occurring liquid found beneath the Earth's surface, used primarily as fuel and in the production of various materials.
In this sentence, 'petróleo' refers to the natural resource extensively used as energy by many nations.
El petróleo es una fuente principal de energía en muchos países.
Oil is a primary source of energy in many countries.
Here, 'petróleo' is mentioned in the context of exploration and discovery of oil fields as natural deposits.
Se ha descubierto un nuevo yacimiento de petróleo en la costa.
A new oil field has been discovered at the coast.
This usage highlights the environmental impact of oil spills, where 'petróleo' is linked to ecological concerns.