The Spanish word 'zeus' comes directly from Ancient Greek 'Ζεύς' (Zeus), the name of the king of the gods in Greek mythology. The word has maintained its exact form and meaning when borrowed into Spanish, referring to the same Greek deity.

While 'zeus' itself is a relatively straightforward borrowing from Greek, you might encounter it in Spanish compound words or cultural references like 'jupiteriano' (Jovian), though Jupiter was the Roman equivalent of Zeus.

In English, we also use 'Zeus' to refer to the same Greek god. The word appears in several English compounds and derivatives such as 'zeusian' (relating to Zeus). The name Zeus is also the source of the first element in the English word 'zeuzeritis,' a humorous term for being struck by lightning.